Need to set a user-defined projection into Carlson 2014. Has anyone successfully implemented the Oregon coordinate Reference System's 'Columbia River West Zone'. This a low distortion projection( LDP), grid distance = ground distance for practical purposes, using an Oblique Mercator Projection, NAD83. Other OR LDP's work with Carlson.
bridge
Here are the parameters that ESRI uses for that projection....
OCRS_Columbia_River_West_NAD_1983_CORS96_OM_Feet_Intl
WKID: 102506 Authority: ESRI
Projection: Hotine_Oblique_Mercator_Azimuth_Natural_Origin
False_Easting: 2133600.0
False_Northing: -914400.0
Scale_Factor: 1.0
Azimuth: -65.0
Longitude_Of_Center: -123.0
Latitude_Of_Center: 42.91666666666666
Linear Unit: Foot (0.3048)
Geographic Coordinate System: GCS_NAD_1983_CORS96
Angular Unit: Degree (0.0174532925199433)
Prime Meridian: Greenwich (0.0)
Datum: D_NAD_1983_CORS96
Spheroid: GRS_1980
Semimajor Axis: 6378137.0
Semiminor Axis: 6356752.314140356
Inverse Flattening: 298.257222101
The OCRS Oblique Mercator zones are of type Rectified Skew Orthomorphic (RSO). RSO is (someone more well-informed please correct me) substantially equivalent to Hotine Natural Origin, which I believe is an option in Carlson. Specifying this instead of using the first "Oblique Mercator" type on the list may do the trick.
http://www.oregon.gov/ODOT/HWY/GEOMETRONICS/docs/presentations/ocrs_columbia_river_west_om_11x17.pdf&apos ;">Here are your zone parameters.
I don't do Carlson so I can't help you there. But I'm quite sure that it is possible. I use StarNet to reduce my measurements to coordinates. StarNet is capable of handling this type of projection. So is C3d. Our Survey Pro data collectors do it. So I'm quite confident that Carlson can.
imaudigger, post: 344804, member: 7286 wrote: Here are the parameters that ESRI uses for that projection....
OCRS_Columbia_River_West_NAD_1983_CORS96_OM_Feet_Intl
WKID: 102506 Authority: ESRI
Projection: Hotine_Oblique_Mercator_Azimuth_Natural_Origin
[hl]False_Easting: 2133600.0[/hl] WRONG
[hl]False_Northing: -914400.0[/hl] WRONG
Scale_Factor: 1.0
Azimuth: -65.0
Longitude_Of_Center: -123.0
Latitude_Of_Center: 42.91666666666666
Linear Unit: Foot (0.3048)
:-$
I managed to apply the feet/meters conversion wrong when we first added the OCRS definitions. The false easting should be 22965879.2651 feet and the false northing should be -9842519.6850 ft. The values in meters are 7000000.0 and -3000000.0.
Melita
RSO implementations often have a second rectifying angle parameter. For this case, I believe you would put the same value (-65.0) as the [skew] azimuth.
:-$ :-$
And, double ugh! The latitude of center value is wrong too. It should be 45.916666666...That'll get fixed in 10.4.0.
See http://www.oregon.gov/odot/hwy/geometronics/docs/presentations/ocrs_columbia_river_west_om_11x17.pdf&apos ;">this pdf for the details.
Melita
(I thought this was going to be a good day after I got an awesome parking space
Nice having someone from ESRI here. Sorry for any embarrassment.
No worries!