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iTool User's Guide: Working with Maps |
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IDL comes with several shapefiles that you can insert in the iMap tool or in another iTool that has a map projection already applied. These files originated from the ESRI Data and Maps CD-ROM data set (1999, 2000, 2002) and can be found, along with their associated database (.dbx) and index (.shx) files, in the resource/maps/shape directory of the IDL installation. Also see Overview of ESRI Shapefiles for more detailed information on shapefiles.
The Insert
Map
Continents operation loads the continents.shp file and displays the continents as a single ShapePolygon (Figure 15-8) in the current dataspace, using the current projection. If no projection is active, then IDL uses geographic coordinates.
The Insert
Map
Countries (low res) operation loads the country.shp file and displays the countries (boundaries as of 2002) as separate ShapePolygons (Figure 15-9) in the current dataspace, using the current projection. If no projection is active, then IDL uses geographic coordinates. The ShapePolygons exist in a Countries (low res) visualization container.
The Insert
Map
Countries (high res) operation loads the cntry02.shp file and displays the countries (boundaries as of 2002) as separate ShapePolygons (Figure 15-10) in the current dataspace, using the current projection. If no projection is active, then IDL uses geographic coordinates. The ShapePolygons exist in a Countries (high res) visualization container.
The Insert
Map
Rivers operation loads the rivers.shp file and displays the rivers as separate ShapePolylines (Figure 15-11) in the current dataspace, using the current projection. If no projection is active, then IDL uses geographic coordinates. The ShapePolylines exist in a Rivers visualization container.
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The Insert
Map
Lakes operation loads the lakes.shp file and displays the lakes as separate ShapePolygons (Figure 15-12) in the current dataspace, using the current projection. If no projection is active, then IDL uses geographic coordinates. The ShapePolygons exist in a Lakes visualization container.
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The Insert
Map
United States operation loads the states.shp file and displays the states as separate ShapePolygons (Figure 15-13) in the current dataspace, using the current projection. If no projection is active, then IDL uses geographic coordinates. The ShapePolygons exist in a United States visualization container.
The Insert
Map
Canadian Provinces operation loads the canadaprovince.shp file and displays the provinces as separate ShapePolygons (Figure 15-14) in the current dataspace, using the current projection. If no projection is active, then IDL uses default longitude-latitude coordinates. The ShapePolygons exist in a Canadian Provinces visualization container.
IDL Online Help (March 01, 2006)