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Lesson 4 Guide: Exploration
Activities
- Mapping the Third Dimension -- making and using a stereoscope
- The Landscape of a Novel -- mapping imaginary spaces
Link to Lesson 4: Exploration
Notes
This lesson explores the use of stereoscopic techniques and concept mapping, two mapping developments in this century. Photogrammetry and remote sensing have become the foundation of modern mapping. Computerized data collection, data base management, and data analysis have eliminated many time-consuming mapping tasks and expanded the capabilities of cartographers. Mapping techniques are being used in new, nongeographic applications.
Mapping the Third Dimension has students make a stereoscope and use stereoscopic aerial photographs to see a three-dimensional image. Students make a map of the image they see.
The Landscape of a Novel has students map places described in a story. Students organize and map the data in categories (i.e., roads, buildings, streams, names) much as digital map data are manipulated. After mapping the geographic setting of the story, the class makes a concept map of the plot.
Glossary
| concept map |
a map-like illustration that shows relationships between concepts. |
| digital mapping |
the making of maps using computerized data and procedures. |
| electromagnetic spectrum |
the range of wavelengths or frequencies of electromagnetic radiation including gamma rays, visible light, and the longest radio waves. |
| image |
likeness of an object or view; in remote sensing, a likeness produced without photography using an electronic spectral sensor. |
| layer |
in digital cartography, map data on a common theme manipulated separately from other types of data. |
| mosaic |
a whole image or map made from parts from more than one source. |
| optics |
the science that deals with light and closely associated phenomena. |
| perspective |
the appearance to the eye of objects in respect to their relative distance and position; the technique of representing the spatial relationship of objects as they might appear to the eye. |
| positional accuracy |
the accuracy of the location of a point. |
| remote sensing |
the process of detecting and monitoring physical characteristics of an area by measuring its reflected and emitted radiation. |
| stereoscope |
a device used to view overlapping photographs to obtain the mental impression of a three-dimensional image, or model. |
Answers to questions
| Mapping the Third Dimension |
| Instruction 4 |
The stereopair of photographs shows a view of the Colorado River in the Grand Canyon. Cartographers would use information acquired from surveying to measure elevations and distances (i.e., scale). For making the topographic map form this image use the following dimensions: top of peak A, altitude 5,600 feet; point Bon the river, altitude 2,700 feet; horizontal distance from B to C, 1,000 feet. |
| The Landscape of a Novel |
| Instruction 2 |
Clear plastic may be available from an art supply store. Handling different kinds of information separately (i.e., as layers) mimics the methods of digital mapping and allows the cartographer to make various maps from the information. In combining layers for a frontispiece map, some or all layers may be used. |
| Instruction 4 |
In concept mapping, there are no right or wrong connections. Concepts can appear in more than one place or be connected to more than one other concept. |
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Intro & Lessons |
Teacher's Guide |
Explorers
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