I have a raster in NAD83 CA State Plane Zone II (US feet) that I need to project to NAD83 CA Teale Albers (US feet). When I run the project raster tool, the false northing on the output raster changes from -4,000,000 (what it should be per the .prj file) to -13,123,333.3333. The difference between the two numbers is a factor of 3.28 so my guess this is a feet to meters issue.
The values of the original raster (the one in SP) are in feet. The spatial reference properties are:
Spatial reference: NAD_1983_StatePlane_California_II_FIPS_0402_Feet
Linear Unit: Foot_US (0.304801)
Angular Unit: Degree (0.0174532925199433)
false_easting: 6561666.666666666
false_northing: 1640416.666666667
central_meridian: -122
standard_parallel_1: 38.33333333333334
standard_parallel_2: 39.83333333333334
latitude_of_origin: 37.66666666666666
Datum: D_North_American_1983
The spatial reference properties that the projected raster SHOULD have:
Spatial reference: NAD_1983_California_Teale_Albers_FtUS
Linear Unit: Foot_US (0.304801)
Angular Unit: Degree (0.0174532925199433)
false_easting: 0
false_northing: -4000000
central_meridian: -120
standard_parallel_1: 34
standard_parallel_2: 40.5
latitude_of_origin: 0
Datum: D_North_American_1983
When I run the tool on the original raster, the spatial reference properties that the raster ends up having:
Spatial reference: NAD_1983_California_Teale_Albers_FtUS
Linear Unit: Foot_US (0.304801)
Angular Unit: Degree (0.0174532925199433)
false_easting: 0
false_northing: -13123333.33333333
central_meridian: -120
standard_parallel_1: 34
standard_parallel_2: 40.5
latitude_of_origin: 0
Datum: D_North_American_1983
The resulting raster ends up somewhere in northern Canada. Certainly no offense to Canada, but I need my data to be in Sonoma County. Any ideas on why -4000000 is being converted to -13123333.3333?
I learned a couple of things since my prior post.
The California Albers coordinate system should have a false northing of –4,000,000 meters. That converts to -13,123,333.333 feet. Make sure you specify this and verify it. Especially if you're working with dam failure inundation maps in HEC-RAS for the state of California's Division of Safety of Dams.
I found this from Melita Kennedy. The false northings for the foot version of Teale Albers was incorrectly defined in the projection parameters. However, behind the scenes it appears to be ok. https://gis.stackexchange.com/questions/343820/is-the-esri-arcgis-definition-of-california-albers-pr...