Building and Using Queries

Learn how to use queries to manipulate your project materials (raster, vector, CAD, TIN, or databases) according to the geoattributes attached to their elements. Queries control which elements in a geodata layer are selected, and how they are displayed, printed in maps, or used in other analytical procedures. Begin with simple one-line expressions and progress towards longer, complex queries that evaluate geoattributes from multiple related tables and objects.

select elements to process

pan by query

logical operations

text / numeric values

symbol / function selection

include comments / variables

style by script

query editor window

computational operations

text variables / operators

table / field selection

save query files

Building and Using Queries (file date: 8 Oct 07)

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