Map Layers Warehouse
Please refer to the Frequently Asked Questions section before downloading. Thank you.
These map layers can be used in geographic information, desktop mapping, and
computer-aided design systems. Map layers are available in Shapefile format and
in the Topological Vector Profile of the Spatial Data Transfer Standard. Image
files are available in the georeferenced tagged image file format (GeoTIFF). Data tables are
distributed in the DBF format.
You can use the online, interactive National Atlas of the United
States to preview the map layers. All map layers can be downloaded at no
cost using file transfer protocol. Though the map layers are compressed, many of
these data files are quite large and can take a very long time to download.
Follow this link for more information about ordering National
Atlas map layers on compact disc.
Most of the map layers were compiled at a scale of 1:2,000,000. Most map layers
cover the full geographic extent of the United States of America, although some
cover the conterminous United States only. Some map layer include Puerto Rico
and the U.S. Virgin Islands.
Download Instructions
Map Layers Download Table |
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Column 1 |
Column 2 |
Column 3 |
Column 4 |
Column 5 |
Map Layer or Table Theme and File Names |
Map Layer or Table Information |
Map Layer or Table Size: Compressed/Decompressed (in bytes) |
Date of Most Recent Data Release | Price When Ordered on Compact Disc |
Abandoned Mine Land Inventory - Coal Mine Related Problems | Temporarily Unavailable | |||
Agriculture Census
Shapefile: agcensp020.tar.gz |
Shapefile: |
May 2003 |
$7.50 | |
SDTS: agcp.tar.gz |
SDTS: |
May 2003 |
$1.00 | |
Airports
Shapefile: airprtx020.tar.gz |
Shapefile: |
October 2001 |
$1.00 | |
SDTS: airx.tar.gz |
SDTS: |
October 2001 |
$1.00 | |
Amphibian Distributions
DBF File: amphibt.tar.gz |
Current Distributions of
Selected Amphibians in the United States Information |
DBF File: |
April 2002 |
$1.00 |
Aquifers of Alluvial and Glacial Origin
Shapefile: alvaqfp025.tar.gz |
Shapefile: |
November 2002 |
$1.00 | |
SDTS: alvp.tar.gz |
SDTS: |
November 2002 |
$1.00 | |
Export: e_alvaqf.tar.gz |
Export: |
November 2002 |
$1.00 | |
Arsenic in Ground Water of the United
States
GeoTIFF File: arsenci020l.tar.gz |
Arsenic in Ground Water of the United States |
GeoTIFF File: |
December 2002 |
$1.00 |
Average Annual Precipitation
Shapefile: prism0p020.tar.gz |
Shapefile: |
November 2000 |
$7.50 | |
SDTS: prmp.tar.gz |
SDTS: |
November 2000 |
$1.00 | |
Average Wage Per Job
Shapefile: bea34bp020.tar.gz |
Shapefile: |
March 2004 |
$1.00 | |
SDTS: be4p.tar.gz |
SDTS: |
March 2004 |
$1.00 | |
Breeding Bird Survey Routes of North America
Shapefile: bbsrtsl020.tar.gz |
Breeding Bird Routes Information | Shapefile: 10,177,380/13,698,048 |
June 2001 | $7.50 |
SDTS: bbrl.tar.gz | SDTS: 6,029,687/9,902,592 |
June 2001 | $1.00 | |
Butterflies
DBF File: butflyt.tar.gz |
Butterflies Information |
DBF File: |
February 2002 | $1.00 |
Cancer Mortality
Shapefile: cancerp020.tar.gz |
Shapefile: |
February 2002 |
$7.50 | |
SDTS: canp.tar.gz |
SDTS: |
February 2002 |
$7.50 | |
Census 1980
DBF File: ce1980t.tar.gz |
DBF File: |
February 2002 | $1.00 | |
Census 1990
DBF File: ce1990t.tar.gz |
DBF File: |
July 2004 | $1.00 | |
Census 2000
DBF File: ce2000t.tar.gz |
DBF File: |
July 2004 | $1.00 | |
Cities and Towns
Shapefile: citiesx020.tar.gz |
Shapefile: |
August 2004 |
$1.00 | |
SDTS: citx.tar.gz |
SDTS: |
August 2004 |
$1.00 | |
Coal Fields of the United States
Shapefile: coalfdp050.tar.gz |
Shapefile: |
August 2001 |
$1.00 | |
SDTS: clfp.tar.gz
|
SDTS: |
August 2001 |
$1.00 | |
Congressional Districts of the United States - 108th
Congress Shapefile: cgd108p020.tar.gz |
Shapefile: |
September 2003 |
$7.50 | |
SDTS: cd8p.tar.gz |
SDTS: |
September 2003 |
$1.00 | |
Continental Divide
Shapefile: condivl020.tar.gz |
Shapefile: |
January 2002 |
$1.00 | |
SDTS: cdvl.tar.gz |
SDTS: |
January 2002 |
$1.00 | |
County Boundaries 2001 Shapefile: countyp020.tar.gz |
County Boundaries 2001 Information | Shapefile: 4,735,258/13,641,216 |
July 2002 | $7.50 |
SDTS: ctyp.tar.gz | SDTS: 4,085,348/8,270,848 |
July 2002 | $1.00 | |
County Boundaries 2000 Shapefile: co2000p020.tar.gz |
County Boundaries 2000 Information | Shapefile: 4,734,078/13,638,144 |
July 2002 | $7.50 |
SDTS: c00p.tar.gz | SDTS: 3,955,449/7,720,448 |
July 2002 | $1.00 | |
County Boundaries 1990 Shapefile: co1990p020.tar.gz |
County Boundaries 1990 Information | Shapefile: 4,733,691/13,635,072 |
July 2002 | $7.50 |
SDTS: c90p.tar.gz | SDTS: 3,958,958/7,736,832 |
July 2002 | $1.00 | |
County Boundaries 1980 Shapefile: co1980p020.tar.gz |
County Boundaries 1980 Information | Shapefile: 4,724,927/13,610,496 |
July 2002 | $7.50 |
SDTS: c80p.tar.gz | SDTS: 3,954,377/7,728,128 |
July 2002 | $1.00 | |
Crimes
Shapefile: crimesp020.tar.gz |
United States Crimes Database Information |
Shapefile: |
January 2003 | $7.50 |
SDTS: crip.tar.gz |
SDTS: |
January 2003 | $7.50 | |
Dams
Shapefile: dams00x020.tar.gz |
Shapefile: |
February 2002 |
$1.00 | |
SDTS: damx.tar.gz |
SDTS: |
February 2002 |
$1.00 | Ecoregions
Shapefile: ecoregp075.tar.gz |
Shapefile: |
March 2004 |
$1.00 |
SDTS: ecrp.tar.gz |
SDTS: |
March 2004 |
$1.00 | |
Energy Consumption
DBF File: ete000t.tar.gz |
Energy Consumption Information |
DBF File: 64,924/156,672 |
September 2004 | $1.00 |
EPA Envirofacts Data | EnviroFacts
Information ---- Air Releases Information ---- Hazardous Waste Data Information ---- CERCLIS Data Information ---- Toxic Releases Information ---- Water Discharge Permits Information ---- Other EPA Sites Information |
These data are not available for download |
||
Federal Lands and Indian Reservations
Shapefile: fedlanp020.tar.gz |
Shapefile: |
October 2003 |
$7.50 | |
SDTS: fedp.tar.gz |
SDTS: |
October 2003 |
$7.50 | |
Forest Cover Types GeoTIFF File: foresti020l.tar.gz |
Forest Cover Types Information |
GeoTIFF File: |
December 2002 |
$1.00 |
Forest Fragmentation - Classification GeoTIFF File: forfrgi1kml.tar.gz |
GeoTIFF File: |
February 2004 |
$1.00 | |
Forest Fragmentation - Causes 1 Kilometer Resolution 540 Meter Resolution 270 Meter Resolution |
Causes of Forest Fragmentation Information |
GeoTIFF File: GeoTIFF File: GeoTIFF File: |
June 2004 |
$1.00 |
Generalized Geologic Map of the Conterminous United States |
Generalized Geologic Map of the Conterminous United States Information | File sizes range from 1.6MB to 5.4MB | March 2001 | Data not available on CD |
Hazard Events
DBF File: sheld0t.tar.gz |
Hazard Events Information |
DBF File: 376,369/3,134,976 |
September 2004 | $1.00 |
Historical North Atlantic Hurricane Tracks - Major Storms
with Landfall in the United States
Shapefile: hurmjrl020.tar.gz |
Shapefile: |
June 2003 |
$1.00 | |
SDTS: hrml.tar.gz |
SDTS: |
June 2003 |
$1.00 | |
Historical North Atlantic Tropical Cyclone Tracks
Shapefile: huralll020.tar.gz |
Historical North Atlantic Tropical Cyclone Tracks Information |
Shapefile: |
June 2003 |
$1.00 |
SDTS: hral.tar.gz |
SDTS: |
June 2003 |
$15.00 | |
Hydrologic Unit Boundaries
Shapefile: hucs00m020.tar.gz |
Shapefile: |
November 2002 |
$7.50 | |
SDTS: hucm.tar.gz |
SDTS: |
November 2002 |
$7.50 | |
Export: e_hucs00.tar.gz |
Export: |
November 2002 |
$7.50 | |
Invasive Species - Chinese Privet
DBF File: wdligut.tar.gz |
Chinese Privet Information | DBF File: 10,098/67,584 |
February 2002 |
$1.00 |
Invasive Species - Tallowtree
DBF File: wdtriat.tar.gz |
Tallowtree Information |
DBF File: |
February 2002 |
$1.00 |
Invasive Species - Common Gorse
DBF File: wdulext.tar.gz |
Common
Gorse Information |
DBF File: |
February 2002 |
$1.00 |
Invasive Species - Leafy Spurge
DBF File: wdeupht.tar.gz |
Leafy
Spurge Information |
DBF File: 10,180/58,880 |
February 2002 | $1.00 |
Invasive Species - Purple Loosestrife DBF File: wdlytht.tar.gz |
Purple
Loosestrife Information |
DBF File: 15,274/110,592 |
February 2002 | $1.00 |
Invasive Species - Zebra Mussels
Shapefile: |
Zebra Mussels Information |
Shapefile: |
May 2003
|
$1.00 |
SDTS: zmux.tar.gz |
SDTS: |
May 2003 |
$1.00 | |
Labor Statistics - Annual Averages for 2001
Shapefile: |
Labor Statistics for the United States - Annual Averages for 2001 |
Shapefile: |
May 2004
|
$1.00 |
SDTS: lbrp.tar.gz |
SDTS: |
May 2004 |
$1.00 | |
Labor Statistics - Annual Averages for 2002
Shapefile: |
Labor Statistics for the United States - Annual Averages for 2002 |
Shapefile: |
May 2004
|
$1.00 |
SDTS: lb2p.tar.gz |
SDTS: |
May 2004 |
$1.00 | |
Land Cover Characteristics
GeoTIFF file: landcvi020l.tar.gz |
GeoTIFF file: 3,966,195/8,440,320 |
December 2002 |
$1.00 | |
Land Cover Diversity
GeoTIFF file: lcdvrsi020l.tar.gz |
GeoTIFF file: 14,931,094/20,837,376 |
December 2002 |
$7.50 | |
Landslide - Costly Events Shapefile: landslx020.tar.gz |
Shapefile: |
April 2001 |
$1.00 | |
SDTS: lslx.tar.gz |
SDTS: |
April 2001 | $1.00 | |
Landslide - Costly Regional Landslide Events Shapefile: landslp020.tar.gz |
Shapefile: |
October 2001 |
$1.00 | |
SDTS: lslp.tar.gz |
SDTS: |
October 2001 |
$1.00 | |
Landslide Incidence and Susceptibility
Shapefile: lsoverp020.tar.gz |
Shapefile: |
September 2002 |
$1.00 | |
SDTS: lsop.tar.gz |
SDTS: |
September 2002 | $1.00 | |
Magnetic Field - Declination Component
Shapefile: dmfcntl020.tar.gz |
Magnetic Field - Declination Component Information | Shapefile: 450,569/957,440 |
April 2001 | $1.00 |
SDTS: dmfl.tar.gz |
SDTS: |
April 2001 | $1.00 | |
Magnetic Field - Declination Secular Variation
Component Shapefile: dsvcntl020.tar.gz |
Magnetic Field - Declination Secular Variation Component Information |
Shapefile: |
April 2001 | $1.00 |
SDTS: not available | SDTS: not available | |||
Magnetic Field - Inclination Component
Shapefile: imfcntl020.tar.gz |
Shapefile: 79,666/181,248 |
April 2001 | $1.00 | |
SDTS: imfl.tar.gz |
SDTS: |
April 2001 | $1.00 | |
Magnetic Field - Inclination Secular Variation
Component Shapefile: isvcntl020.tar.gz |
Magnetic Field - Inclination Secular Variation Component Information |
Shapefile: |
April 2001 | $1.00 |
SDTS: isvl.tar.gz |
SDTS: |
April 2001 | $1.00 | |
Magnetic Field - Total Field Intensity
Shapefile: fmfcntl020.tar.gz |
Magnetic Field - Total Field Intensity Information | Shapefile: 95,209/210,944 |
April 2001 | $1.00 |
SDTS: fmfl.tar.gz | SDTS: 92,727/190,976 |
April 2001 | $1.00 | |
Magnetic Field - Total Field Intensity Secular
Variation Shapefile: fsvcntl020.tar.gz |
Magnetic Field - Total Field Intensity Secular Variation Information | Shapefile: 26,8691/562,176 |
April 2001 | $1.00 |
SDTS: fsvl.tar.gz | SDTS: 244,342/394,752 |
April 2001 | $1.00 | |
Magnetic Field - Horizontal Intensity
Shapefile: hmfcntl020.tar.gz |
Magnetic Field - Horizontal Intensity Information | Shapefile: 100,192/219,136 |
April 2001 | $1.00 |
SDTS: hmfl.tar.gz |
SDTS: |
April 2001 | $1.00 | |
Magnetic Field - Horizontal Intensity secular
variation Shapefile: hsvcntl020.tar.gz |
Magnetic Field - Horizontal Intensity Secular Variation Information | Shapefile: 302,683/621,568 |
April 2001 | $1.00 |
SDTS: hsvl.tar.gz | SDTS: 274,500/419,840 |
April 2001 |
$1.00 | |
Magnetic Field - Vertical Intensity
Shapefile: zmfcntl020.tar.gz |
Magnetic Field - Vertical Intensity Information |
Shapefile: |
April 2001 | $1.00 |
SDTS: zmfl.tar.gz |
SDTS: |
April 2001 | $1.00 | |
Magnetic Field - Vertical Intensity Secular
Variation Shapefile: zsvcntl020.tar.gz |
Magnetic Field - Vertical Intensity Secular Variation Information | Shapefile: 185,579/385,536 |
April 2001 | $1.00 |
SDTS: zsvl.tar.gz | SDTS: 171,571/289,792 |
April 2001 | $1.00 | |
Mineral Operations - Agricultural Shapefile: minop1x020.tar.gz |
Mineral Operations - Agricultural Information | Shapefile: 23,401/476,160 |
June 2004 | $1.00 |
SDTS: mo1x.tar.gz | SDTS: 32,309/514,048 |
June 2004 | $1.00 | |
Mineral Operations - Construction Shapefile: minop2x020.tar.gz |
Mineral Operations - Construction Information | Shapefile: 51,689/1,294,336 |
June 2004 | $1.00 |
SDTS: mo2x.tar.gz | SDTS: 67,535/1,344,512 |
June 2004 | $1.00 | |
Mineral Operations - Ferrous Metal Mines
Shapefile: minop3x020.tar.gz |
Mineral Operations - Ferrous Metal Mines Information | Shapefile: 7,717/80,384 |
November 1998 | $1.00 |
SDTS: mo3x.tar.gz | SDTS: 952,684/1,444,864 |
November 1998 | $1.00 | |
Mineral Operations - Ferrous Metals Processing
Plants Shapefile: minop4x020.tar.gz |
Mineral Operations - Ferrous Metal Processing Plants Information | Shapefile: 10,159/135,680 |
November 1998 | $1.00 |
SDTS: mo4x.tar.gz | SDTS: 957,996/1,563,136 |
November 1998 | $1.00 | |
Mineral Operations - Miscellaneous Industrial
Shapefile: minop5x020.tar.gz |
Shapefile: |
July 2004 |
$1.00 | |
SDTS: mo5x.tar.gz |
SDTS: |
July 2004 |
$1.00 | |
Mineral Operations - Nonferrous Metal Mines
Shapefile: minop6x020.tar.gz |
Shapefile: |
October 2003 |
$1.00 | |
SDTS: mo6x.tar.gz |
SDTS: |
October 2003 |
$1.00 | |
Mineral Operations - Nonferrous Metal Processing
Plants
Shapefile: minop7x020.tar.gz |
Mineral Operations - Nonferrous Metal Processing Plants Information |
Shapefile: |
October 2003 |
$1.00 |
SDTS: mo7x.tar.gz |
SDTS: |
October 2003 |
$1.00 | |
Mineral Operations - Refractory, Abrasive, and Other
Industrial
Shapefile: minop8x020.tar.gz |
Mineral Operations - Refractory, Abrasive, and Other Industrial Information | Shapefile: 32,049/706,048 |
June 2004 | $1.00 |
SDTS: mo8x.tar.gz | SDTS: 42,786/747,008 |
June 2004 | $1.00 | |
Mineral Operations - Sand and Gravel Shapefile: sndgrvx020.tar.gz | Mineral Operations - Sand and Gravel Information | Shapefile: 158,937/1,093,120 |
February 2002 | $1.00 |
SDTS: sgvx.tar.gz | SDTS: 207,327/1,120,768 |
February 2002 | $1.00 | |
Mineral Operations - Stone, Crushed Shapefile: crstonx020.tar.gz |
Mineral Operations - Stone, Crushed Information | Shapefile: 128,058/793,088 |
February 2002 | $1.00 |
SDTS: cstx.tar.gz | SDTS: 167,854/821,248 |
February 2002 | $1.00 | |
Mortality, 1988-1992 Shapefile: mortalp020.tar.gz |
Mortality, 1988-1992 Database Information | Shapefile: 3,722,981/19,589,632 |
October 2002 | $7.50 |
SDTS: mrtp.tar.gz | SDTS: 3,450,460/15,658,496 |
October 2002 | $7.50 | |
Moths DBF File: moths0t.tar.gz |
Moths Information | DBF File: 56,214/1,172,992 |
February 2002 | $1.00 |
NAWQA Surface-Water Sampling Sites Shapefile: sw9194x020.tar.gz |
NAWQA Surface-Water Sampling Sites Information | Shapefile: 62,204/273,408 |
February 2002 | $1.00 |
SDTS: sw9x.tar.gz | SDTS: 80,451/301,568 |
February 2002 | $1.00 | |
Nighttime Lights of North
America GeoTIFF file: nitelti020l.tar.gz |
Nighttime Lights of North America Information | GeoTIFF
file: 2,125,393/5,261,824 |
January 2003 | $1.00 |
North American Bat Ranges
Shapefile: bat000m020.tar.gz |
North American Bat Ranges Information | Shapefile: 10,550,141/28,948,992 |
May 2003 | $7.50 |
SDTS: batm.tar.gz | SDTS: 13,224,069/23,255,552 |
May 2003 | $7.50 | |
Number of Wage and Salary Jobs
Shapefile: bea34ap020.tar.gz |
Shapefile: |
March 2004 |
$1.00 | |
SDTS: be3p.tar.gz |
SDTS: |
March 2004 |
$1.00 | |
Official Protraction Diagrams/Leasing
Map: Shapefile: opdlm0p020.tar.gz |
Official Protraction
Diagrams/Leasing Map Information |
Shapefile: 1,047,829/1,550,336 |
May 2001 | $1.00 |
SDTS: opdp.tar.gz | SDTS: 587,860/1,238,016 |
May 2001 | $1.00 | |
Parkways and Scenic Rivers Shapefile: fedlanl020.tar.gz |
Parkways and
Scenic Rivers Information |
Shapefile: 216,498/657,920 |
July 2001 | $1.00 |
SDTS: fedl.tar.gz | SDTS: 253,936/498,176 |
July 2001 | $1.00 | |
Per Capita Personal Income
Shapefile: bea13bp020.tar.gz |
Shapefile: |
March 2004 |
$1.00 | |
SDTS: be2p.tar.gz |
SDTS: |
March 2004 |
$1.00 | |
Personal Income
Shapefile: bea13ap020.tar.gz |
Shapefile: |
March 2004 |
$1.00 | |
SDTS: be1p.tar.gz |
SDTS: |
March 2004 |
$1.00 | |
Presidential General Election 2000, State
Results DBF File: el2000t.tar.gz |
2000 Presidential Election, State Results Information | DBF File: 5,895/27,648 |
February 2002 | $1.00 |
Presidential General Election 2000, County Results | 2000 Presidential Election, County Results Information | These data are not available for download. | ||
Principal Aquifers of the United States, Puerto Rico and the U.S. Virgin Islands Shapefile: aquifrp025.tar.gz |
Principal Aquifers Information | Shapefile: 7,787,575/11,060,224 |
October 2003 | $7.50 |
SDTS: usaq.tar.gz | SDTS: 2,971,832/5,499,392 |
October 2003 | $1.00 | |
Geodatabase: g_aquifr.tar.gz | Geodatabase: 8,384,570/12,908,544 |
October 2003 | $7.50 | |
Public Land Survey System Shapefile: plss00p020.tar.gz |
Public Land Survey System Information |
Shapefile: 9,060,502/76,196,352 |
January 2003 | $7.50 |
SDTS: plsp.tar.gz | SDTS: 13,641,798/100,248,576 |
January 2003 | $7.50 | |
Railroads Shapefile: railrdl020.tar.gz |
Railroads Information | Shapefile: 1,622,695/5,837,312 | December 1998 | $1.00 |
SDTS: rrdl.tar.gz | SDTS: 1,707,696/5,085,184 |
December 1998 | $1.00 | |
Realtime Streamflow Stations Shapefile: realstx.tar.gz |
Shapefile: varies daily |
Data is updated daily | not available on compact disc | |
Export: realstx.e00.gz | Export: varies daily |
Data is updated daily | not available on compact disc | |
Roads Shapefile: roadtrl020.tar.gz |
Roads Information | Shapefile: 4,597,538/23,143,424 | January 2002 | $7.50 |
SDTS: rdtl.tar.gz | SDTS: 5,152,878/24,121,344 |
April 2003 | $7.50 | |
Seismic Hazards Shapefile: seihazp020.tar.gz |
Seismic Hazards Information | Shapefile: 4,198,009/5,713,408 | August 2002 | $1.00 |
SDTS: shzp.tar.gz | SDTS: 2,490,527/4,011,520 |
August 2002 | $1.00 | |
Shaded Relief of North America GeoTIFF File: shdrlfi0201.tar.gz |
Shaded Relief Information | GeoTIFF
File: 41,255,401/226,259,456 |
April 2003 | $15.00 |
Significant and Historic
Earthquakes Shapefile: quksigx020.tar.gz |
Earthquake Information | Shapefile: 71,004/481,280 |
August 1999 | $1.00 |
SDTS: qksx.tar.gz | SDTS: 1,080,303/2,120,704 |
August 1999 | $1.00 | |
States Shapefile: statesp020.tar.gz |
States Information | Shapefile: 2,429,560/6,908,928 | July 2002 | $1.00 |
SDTS: stap.tar.gz | SDTS: 2,341,468/3,849,728 |
July 2002 | $1.00 | |
Streams and Waterbodies Shapefile: hydrogm020.tar.gz |
Streams and Waterbodies Information | Shapefile: 34,729,355/115,467,776 | January 2003 | $7.50 |
SDTS: hydm.tar.gz | SDTS: 21,444,809/58,603,520 |
January 2003 |
$7.50 | |
Surficial Deposits and Materials, Eastern and Central United States | Surficial Deposits and Materials Information | File sizes range from 1.2MB to 78MB | February 2004 | Data not available on CD |
Time Zone Shapefile: timeznp020.tar.gz |
Time Zone Information | Shapefile: 4,648,167/7,075,840 | September 2004 | $1.00 |
SDTS: tmzp.tar.gz | SDTS: 2,430,226/4,382,720 |
September 2004 | $1.00 | |
Urban Areas Shapefile: urbanap020.tar.gz |
Urban Areas Information | Shapefile: 867,430/2,870,784 |
January 2001 | $1.00 |
SDTS: urbp.tar.gz | SDTS: 1,164,775/3,399,680 |
January 2001 | $1.00 | |
Volcanoes Shapefile: volcanx020.tar.gz |
Volcanoes Information | Shapefile: 38,900/182,272 |
April 2004 | $1.00 |
SDTS: volx.tar.gz | SDTS: 53,769/225,792 |
April 2004 | $1.00 | |
West Nile Virus 2000 Data Human Cases DBF File: wnvhumt.tar.gz Mosquito Surveillance DBF File: wnvmost.tar.gz Sentinel Flock Surveillance DBF File: wnvchkt.tar.gz Veterinary Cases DBF File: wnvvett.tar.gz Wild Bird Cases DBF File: wnvavit.tar.gz |
Human Cases Mosquito Surveillance Sentinel Flock Surveillance Veterinary Cases Wild Bird Cases |
DBF File: 36,363/617,472 DBF File: 19,789/625,664 DBF File: 18,169/314,368 DBF File: 33,635/314,368 DBF File: 95,418/1,630,208 |
November 2002 | $1.00 per file |
West Nile Virus 2001 Data Human Cases DBF File: w01humt.tar.gz Mosquito Surveillance DBF File: w01most.tar.gz Sentinel Flock Surveillance DBF File: w01chkt.tar.gz Veterinary Cases DBF File: w01vett.tar.gz Wild Bird Cases DBF File: w01avit.tar.gz |
Human Cases Mosquito Surveillance Sentinel Flock Surveillance Veterinary Cases Wild Bird Cases |
DBF File: 120,204/2,216,960 DBF File: 80,106/1,422,336 DBF File: 76,174/1,400,320 DBF File: 117,972/2,229,760 DBF File: 235,821/4,303,360 |
November 2002 | $1.00 per file |
West Nile Virus 2002 Data |
These data are not available for download, see below. |
|||
West Nile Virus 2003 Data |
These data are not available for download, see below. |
|||
Wilderness Preservation System
Shapefile: wildrnp020.tar.gz |
Shapefile: |
February 2004 |
$1.00 | |
SDTS: wldp.tar.gz |
SDTS: 912,290/1,944,576 |
February 2004 | $1.00 | |
Wildlife Mortality Frequency Data DBF File: wlmtfrt.tar.gz Botulism DBF File: wlbotut.tar.gz Cholera DBF File: wlcholt.tar.gz Lead Poisoning DBF File: wlleadt.tar.gz OP/CARB Poisoning DBF File: wlopcat.tar.gz |
Wildlife
Mortality Information |
Frequency Data DBF File: 39,037/396,800 Botulism DBF File: 27,872/176,128 Cholera DBF File: 20,342/134,144 Lead Poisoning DBF File: 12,542/66,560 OP/CARB Poisoning DBF File: 17,371/88,064 |
October 2002 | $1.00 per file |
How do I learn more about a particular map layer before
downloading?
You will find links to separate web pages that describe the
contents of each map layer in the second column of the Map Layers
Download Table.
Go back to list of
questions.
Are the map layers compressed?
Yes. The map
layers were compressed on a Unix system using the tar and gzip utilities. We
also use the tar utility to combine two or more files into a single file for
download.
Go
back to list of questions.
How do I get software to "decompress" them?
Here are links to online decompression software for the following operating systems:
WindowsXP | Windows98 | Macintosh |
Windows2000 | Windows95 | |
WindowsNT | Windows3.1 |
What are the file formats for the National Atlas map
layers and data tables?
When I decompress a Shapefile map layer, I get four
separate files. What are these?
An ESRI Shapefile
consists of a main file, an index file, and a dBASE table; we have added a
fourth file that provides a detailed description of the map layer. The main
file, the index file, the dBASE file, and the description file all have the same
prefix ("airprtx020," for example). The suffix for the main file is ".shp". The
suffix for the index file is ".shx". The suffix for the dBASE table is ".dbf".
And the suffix for the metadata description file which describes the data is
".met" and ".txt".
Go back to list of
questions.
What kind of software do I need to do anything with
these map layers?
The map layers can be used in desktop mapping,
computer-aided drafting and design, image processing, and in geographic
information systems . These files will not work with many common types of
software you may use at home or in the office (including word processors,
spreadsheets, and data base managers). We have provided a basic online
geographic information system (GIS) that allows you to view and query the map
layers using your web browser. Follow this link to the National
Atlas of the United States interactive map browser.
A useful list of
3rd party data conversion tools for GIS files can be found at http://www.grime.net/GISTools/index.htm.
This site also provides links to an extensive list of software tools that are
used to read and write common GIS data formats.
Who sells software that supports map layers in the
Shapefile format?
The following organizations have products that allow
you to open, translate, manipulate, analyze, and/or display National Atlas map
layers in the Shapefile format. We list the organization name first and then the
titles of any software products that are known to (at a minimum) read
Shapefiles. We suspect this list is not complete and welcome any information we
can use to update the list.
Argus
Interware, Incorporated -- ArgusONE
Autodesk, Incorporated -- AutoCADMap, AutodeskMapGuide,
AutodeskWorld
Avenza Systems, Incorporated --
MAPublisher
Bentley Systems, Incorporated -- MicroStation GeoGraphics
Caliper Corporation -- Maptitude, TransCAD, Maptitude for the Web, Maptitude for Great Britain
Cadcorp, Incorporated -- Cadcorp SIS
Clark Labs, Clark University -- Idrisi32, CartaLinx
ComGrafix Technologies, Incorporated --
MapGrafix,
GeoInsight
forRagTime
Department
of Defense -- Brigham Young University
Environmental Modeling Research Laboratory -- GroundwaterModeling System
Earth Resource Mapping -- ER Mapper (free
download), GeoMorph
Environmental Systems Research Institute (ESRI)
-- ArcExplorer
(free download), Arc/Info, ArcView, AtlasGIS
GenaWarehouse --
GenaMap
Geographic Resources Analysis Support System (GRASS)
(free
download)
Global Mapper
(free trial
download)
Intergraph Corporation -- GeoMedia, GeoMedia Pro, ModularGIS
Environment
Manifold Net Ltd. -- ManifoldSystem GIs
MapInfo -- MapInfoProfessional,
Othermapping
products
Map Maker North America Ltd. -- Map Maker Gratis (free download),
Map Maker Pro
products
MapPro,
Inc. -- MapPro
MicroImages -- TNTmips, TNTedit, TNTview, TNTlite (free download)
Minnesota Planning Land Management
Information Center -- EPPL7
PCI Geomatics Group Incorporated -- EASI/PACE, Freeview (free
download), ImageWorks, SPANS
Tachyon Unit -- Locatable, VOICE
Terraseer -- BoundarySeer, ClusterSeer
ThinkSpace, Incorporated -- MFworks
United States Geological Survey -- dlgv32 Pro (free download)
United States
Naval Academy, Department of Oceanography -- MICRODEM(free
download)
Who sells software that supports map layers in
the SDTS Topological Vector Profile format?
The following organizations
have products that allow you to open, translate, manipulate, analyze, and/or
display National Atlas map layers in the SDTS-TVP format. We list the
organization name first and then the titles of any software products that are
known to (at a minimum) read SDTS-TVP transfers. We suspect this list is not
complete and welcome any information we can use to update the list.
Avenza Systems, Incorporated -- MAPublisher
Cadcorp, Incorporated -- Cadcorp SIS
Caliper Corporation -- Maptitude, TransCAD, Maptitude for the Web, Maptitude for Great Britain
Clark Labs, Clark University -- Idrisi32, CartaLinx
Environmental Systems Research Institute (ESRI)
-- Arc/Info
Geographic Resources Analysis Support System (GRASS)
(free
download)
Global Mapper
(free trial
download)
Intergraph Corporation -- Modular GIs Environment
Manifold Net Ltd. -- ManifoldSystem GIs
MicroImages -- TNTmips, TNTedit, TNTview
United States Geological Survey -- dlgv32 Pro (free download)
Who sells software that supports map layers
in the Arc/Info Export format?
The following organizations have products
that allow you to open, translate, manipulate, analyze, and/or display National
Atlas map layers in an Arc/Info Export format. We list the organization name
first and then the titles of any software products that are known to (at a
minimum) read Export files. We suspect this list is not complete and welcome any
information we can use to update the list.
Bentley Systems, Incorporated -- MicroStation GeoGraphics
Cadcorp,
Incorporated -- Cadcorp
SIS
Caliper Corporation -- Maptitude, TransCAD, Maptitude for the Web, Maptitude for Great Britain
Earth Resource
Mapping -- ER Mapper (free
download)
Environmental Systems Research
Institute (ESRI) -- Arc/Info, ArcView, MapObjects
Geographic Resources Analysis Support System (GRASS)
(free
download)
Global Mapper
(free trial
download)
Manifold Net Ltd. -- ManifoldSystem GIs
MicroImages -- TNTmips, TNTedit, TNTview
PCI Geomatics Group Incorporated
-- EASI/PACE, Freeview (free
download), ImageWorks, SPANS
United States Geological Survey -- dlgv32 Pro (free download)
Some map layers, such as Butterfly, are listed as
"DBF" files. What are these?
Using the online, interactive National Atlas
mapping system, you can select and display maps of butterfly and moth
occurrences by county. These maps are creating by using data tables containing
information about moths and butterflies in conjunction with a map layer that
shows county boundaries. These "DBF" files are data tables that contain
information about all butterfly or moth species in America, by county. These
tables are used in conjunction with the County Boundaries map layer to map the
occurrence of moths and butterflies throughout the United States. In order to
use these tables within a desktop mapping or geographic information system, you
must also download the County Boundaries map layer and use a relational data
base manager to relate or join the map layer to the appropriate table. For more
detailed information about the relationship between the County Boundaries map
layers and the butterfly and moth occurrence tables, please review their
information files shown in the second column of the Map Layers
Download Table.
Some map layers, such as Land Cover Diversity, are
listed as" GeoTIFF" files. What are these?
Some National Atlas maps are
actually images. Image data may also be referred to as raster data. An image
consists of regularly spaced squares (also known as pixels) in which a value is
assigned to each square. Each of these squares represents an area on the ground.
The values can represent any characteristic assigned to that square such as an
index of land cover diversity, elevation, or annual precipitation.
GeoTIFF is an acronym for georeferenced tag image file format. The Tagged Image File Format (TIFF) is a commonly used format for storing map images. GeoTIFF refers to TIFF files which have geographic information embedded within the TIFF file. This geographic information can then be used to position the image in its correct location in the world and on the screen of a geographic information display.
TIFF and GeoTIFF are supported by most image processing programs, such as PhotoShop and ERDAS.
You may follow this link for technical information about the GeoTIFF file format.
Wow! When I decompressed the Principal Aquifers map
layer in SDTS format I got 29 files. What are these?
One of these is a metadata file that
provides detailed information about the map layer. Another is a brief
descriptive text file called README that is required by the Spatial Data
Transfer Standard. The remaining files are modules of a topological vector
profile SDTS transfer. Follow this link for technical information about the
SDTS.
Go back to list of
questions.
Can I order the
map layers on disc or tape?
Map layers from the National Atlas of the
United States are now available on compact disc (tape is not available). An
online inventory and ordering system is provided for your convenience. There's a
base price of $45 per disc and a handling fee of $5.00 per order. Add to that
the price of each file you want. Small files (less than 10 megabytes in size)
sell for $1. Large files (150 megabytes or larger) sell for $15 each. Files that
range in size between 10 and 150 megabytes sell for $7.50 per file. Please note
that the files delivered on disc are not compressed and the price is determined
by the full file size. You can use the Map Layers Download Table near the top of
this page to determine file sizes and prices.
For international orders, the $5 handling fee plus an additional $20 shipping charge applies. International orders exceeding 50 items will be charged actual shipping costs plus the $5 handling fee.
Follow this link to order National Atlas map layers on compact disc. Under Data Set Selection, choose the National Atlas of the United States. The online inventory and ordering system employs a familiar "shopping basket" metaphor that allows you to browse our data offerings and add (and remove) items from this basket before actually placing an order. You may pay for your order by check, money order, or by using Visa, MasterCard, American Express, or Discover cards. Follow this link for more information about using the online inventory and ordering system.
How can I understand your file naming
conventions?
We currently use a ten character file naming convention for
map layers in the Shapefile format. Let's use the Federal and Indian Lands map
layers to illustrate its use. The first six of the ten characters before the
"dot" are reserved for unique, somewhat descriptive, file names (fedlan
). The seventh character indicates whether the map layer contains area
features, linear features, point features, etc. The letter "p" as the seventh
character (fedlanp) indicates that this map layer includes Federal and
Indian Lands areas (polygons). The letter "l" (fedlanl) indicates that
this map layer includes linear Federal and Indian Lands, such as parkways and
scenic rivers. An "x" as the seventh character in a file name (fedlanx)
indicates that the map layer contains data with so little area extent that it is
represented by points. Raster data sets can be identified with an "i" for"
image" or the letter "g" for "grid." The last three characters (eight through
ten) in a file name are reserved for an indication of map scale. A value of
005 indicates a scale of 1:500,000 while a value of 020 indicates
data at a scale of 1:2,000,000. A value of 025 indicates data at a
scale of 1:2,500,000. A value of 075 indicates a scale of 1:7,500,000 and
a value of 150 indicates a scale of 1:15,000,000. The file name appendage
(the three characters after the "dot") are assigned by whoever produces the map
layer. It is normally used to indicate file type. For example, a small Arc/Info
Export file will always have a file name appendage of ".E00."
Column |
Contents |
1-6 | unique name |
7 | topology - (p)olygon, (l)ine, (m)ixed (polygons and lines), (x)point, (i)mage, and (g)rid, (t)able |
8-10 | scale - 005=500K, 020=2M, 025 = 2.5M, 040=4M, 075 = 7.5M, 150= 15M |
The file
naming convention required by the SDTS Topological Vector Profile is far
more rigid. Here, we can use only the first four characters in a mandatory
"eight dot three" (8.3) file naming convention. We use the first three
characters as the unique file name. The fourth character indicates topology (p =
polygon, l = line, m = mixed, x = point, i = image, and g = grid).
What is "metadata?"
Metadata is "data about
data." National Atlas map layers are georeferenced. That is, the lines, points,
and areas on our maps refer to some specific place on the Earth's surface. For a
digital map, satellite image, or other georeferenced information to be useful it
may be necessary to know its name, location, author or source, date, data
format, resolution, etc. The Federal Geographic
Data Committee(FGDC) is working with industry and state and local government
to develop voluntary standards for metadata. The FGDC developed and published
the Content Standard for Digital Geospatial Metadata. When you download and
decompress a National Atlas map layer, the file whose name ends with ".met" or
".txt" is a metadata file that conforms to this FGDC standard. You may also
display a hypertext markup language (HTML) version of this file by clicking on
the file name shown in the second column of the Map Layers
Download Table. We prefer to refer to these as "map layer description files"
since this phrase conveys a little more information and sounds a lot less
bureaucratic.
Go back to list of
questions.
Why is there more than one map layer for
some themes (such as water features)?
On maps, some features in the real
world are represented by enclosed areas, some features are represented by lines,
and some are represented by points. For example, a large lake may be drawn as an
enclosed area (often tinted blue), a stream may be symbolized as a line, and a
spring may be represented as a single point. A shapefile can only contain
one type of feature, points, lines, or areas. This means that for some of
the themes there are multiple map layer shapefiles bundled in the compressed
file.
Can I get the 2002 or the 2003 West Nile Virus data?
The data used to create the maps is not available for release by either the National Atlas
or the USGS. The data is obtained from CDC. CDC, in turn, obtains the data from state health departments that have agreed with CDC on public dissemination of that data in certain forums: USGS maps, the Morbidity and Mortality Weekly Report
(MMWR), the CDC web site, and select scientific publications. For more information please contact the Centers for Disease Control West Nile Virus Surveillance Team (email:
dvbid@cdc.gov).
How can I learn more about the National Atlas of the United
States?
Click on this link to the National Atlas of the United States home
page.