State Plane Coordinates (SPCS)

The program currently has the following limited support for state plane coordinates:

• Vector map projections may be able to use the projections.  Whether the maps will work correctly is unknown, but the projection routines are working.  They were needed for the database conversions, the sole reason for supporting the projection.
• Convert coordinates There is a limited converter, from state plane to lat/long.  This was designed solely to test the database conversion options, for which it works perfectly.  Any other beneficial uses are coincidental.  This is invoked from the pop up menu after selecting the coordinate conversion button.
• Point databases and shape files can be converted from SPCS to lat-long, which is required to use them in the program. 
• You can open imagery with a world file. A number of states (e.g. MD, NJ, TX) supply DOQQs in this format over the WWW.
• SPCS DEMs
• SPCS imagery

Two databases in the MICRODEM program directory define the constants for SPCS: SPCS_TM_83.DBF and SPCS_LCC_83.DBF. If you have problems with the conversions, you should verify that these files have the correct data for your zone. You can also add other projections, and if they use NAD83/WGS84, and a Transverse Mercator or Lambert Conformal Conic Projection, it should work under the same conditions as SPCS.

Last revision 6/13/2007