State Plane Coordinates
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
- 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
- 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