# Title
Add unit_conversion_factor for units in coordinate axis to convert to meters
# Moderator
Any takers?
# Moderator Status Review [last updated: YY/MM/DD]
???
# Requirement Summary
Currently, in the WKT form, you can specify the conversion factor to meters
along with the name of the units for a cartesian coordinate system:
```
CS[Cartesian,2],
AXIS["easting (X)",east,
ORDER[1],
LENGTHUNIT["US survey foot",0.304800609601219,
ID["EPSG",9003]]],
AXIS["northing (Y)",north,
ORDER[2],
LENGTHUNIT["US survey foot",0.304800609601219,
ID["EPSG",9003]]]
```
This is also the same for degrees to convert to radians in an ellipsoidal
projection system:
```
CS[ellipsoidal,2],
AXIS["geodetic latitude (Lat)",north,
ORDER[1],
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]],
AXIS["geodetic longitude (Lon)",east,
ORDER[2],
ANGLEUNIT["degree",0.0174532925199433,
ID["EPSG",9122]]]
```
# Technical Proposal Summary
For example:
```
double y(y);
y:units = "US survey foot";
y:unit_conversion_factor: 0.304800609601219;
y:long_name = "y coordinate of projection";
y:standard_name = "projection_y_coordinate";
double x(x);
x:units = "US survey foot";
x:unit_conversion_factor: 0.304800609601219;
x:long_name = "x coordinate of projection";
x:standard_name = "projection_x_coordinate";
```
# Benefits
This removes the need of having a lookup table to convert any unit the provider
gives to meters (or whatever the standard unit is for the axis). It makes the
provider of the dataset responsible for giving that information to the user.
# Status Quo
I couldn't find something like this in the spec.
# Detailed Proposal
See above ^^
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