1. Managing Geographic Files
TransCAD
Managing Geographic Files
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2. To Copy a Geographic File
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3. To Rename or Delete a Geographic File
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4. To Save Settings for a Geographic File
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5. To Optimize a Geographic File
TransCAD stores information in geographic files so that it can be displayed quickly. When a large number of features are added to or deleted from a standard format geographic file, the information is stored less efficiently. The result is that maps will not draw as fast. To correct this, you optimize the geographic file. When you optimize the file, TransCAD rearranges the information to save space and increase the speed of drawing.
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6. To Simplify a Geographic File
Another way that line geographic files can be reorganized is to simplify them. At nodes where there are only two lines you can join lines and remove the node. You can choose one or more fields that must be compared before the lines are joined. If the values in any of the chosen fields are different, the lines will not be joined. You can also choose a numeric flag field for preserving nodes. If the field contains the value 1 the node will be preserved; otherwise the node can be removed.
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8. To Archive and Restore a Geographic File
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9. Metadata
Metadata are data about data.
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12. To Merge Geographic Files
Open two geographic files of the same type as layers in one or more maps. If you want to merge just selected features, create a selection set in either or both layers.
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13. To Create a Vector Grid Based on the Projection or Coordinate System Used in the Map Window
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14. To Link a Document, Program, or Web Site to a Map Feature
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16. To Create or Edit a Slide Show
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17. PgDn – next PgUp – previous Home – start over End or Esc – end
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