Introduction to Geographic Information Systems, Volume 1 |
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Page 42
... fire coverage with fire records spanning from the late 1900s to the 1960s ( Box 3.3 ) . Each fire year or period is handled as a region subclass . The regions data structure consists of two ba- sic elements : a file on the region - arc ...
... fire coverage with fire records spanning from the late 1900s to the 1960s ( Box 3.3 ) . Each fire year or period is handled as a region subclass . The regions data structure consists of two ba- sic elements : a file on the region - arc ...
Page 51
... fire contains areas that have been burned once , and some twice or even three times . The regions data model is ideal for working with overlapped polygons , such as overlapped polygons of past forest fires . Change the workspace to fire ...
... fire contains areas that have been burned once , and some twice or even three times . The regions data model is ideal for working with overlapped polygons , such as overlapped polygons of past forest fires . Change the workspace to fire ...
Page 301
... fire . The coverage fire shows past fires in a na- tional forest . Three attribute items ( fire 1 , fire2 , and fire3 ) record up to three fire events in a given polygon . For example , a polygon with recorded fires in 1909 , 1923 , and ...
... fire . The coverage fire shows past fires in a na- tional forest . Three attribute items ( fire 1 , fire2 , and fire3 ) record up to three fire events in a given polygon . For example , a polygon with recorded fires in 1909 , 1923 , and ...
Contents
Key Concepts and Terms | 12 |
Map Projection | 15 |
1 How to Measure Distances on | 18 |
33 other sections not shown
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Common terms and phrases
accuracy affine transformation algorithm Arc View ARC/INFO Arcedit Arcplot attribute data attribute table buffer Cartographers cell values choropleth map click OK color command control points convert coordinate system create data analysis data exploration data model data query data structure destination table dialog digital maps display dynamic segmentation editing elevation grid ESRI example Figure Geographical Information Systems geometric GIS data GIS packages GIS users graphic Idaho input map intersect kriging label map features map overlay map projection map unit meters method node operation output grid parameters polygon coverage quad raster data records region subclass relational database relationship scale semivariance shapefile shows slope and aspect soil spatial data spatial features spatial interpolation specified splines surface symbols Task Theme menu theme table tion tool topological transformation Transverse Mercator transverse Mercator projection USGS vector data wp.shp zone