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FAQ: How does ArcPad interpret the contents of projection (.PRJ) files?

Question

How does ArcPad interpret the contents of projection (.PRJ) files?

Answer

ArcPad uses .PRJ files to interpret the spatial projection for shapefiles and other data formats. ArcPad examines the contents of .PRJ files and attempts to match values with internal projection tables. If any values are unmatched, the projection may not work correctly in ArcPad.

Consider the contents of the following .PRJ file:

PROJCS["AGD_1966_AMG_Zone_55",
GEOGCS["GCS_Australian_1966",
DATUM["D_Australian_1966",
SPHEROID["Australian",6378160,298.25]],
PRIMEM["Greenwich",0],
UNIT["Degree",0.0174532925199433]],
PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",500000],
PARAMETER["False_Northing",10000000],
PARAMETER["Central_Meridian",147],
PARAMETER["Scale_Factor",0.9996],
PARAMETER["Latitude_of_Origin",0.0],
UNIT["Meter",1.0]]

ArcPad interprets this .PRJ as shown in the following illustration:
[O-Image] PRJ File Translation

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