topic Re: Where can I find this coordinate reference system (wgs84 30N CM 3W) in ArcGIS? in Coordinate Reference Systems Questions

Where can I find this coordinate reference system (wgs84 30N CM 3W) in ArcGIS?

Elijah — Mon, 11 Mar 2019 21:46:24 GMT

I have a data with this coordinate reference system (wgs84 30N CM 3W). and I need to load the data in ArcGIS but I can't seem to find it exactly in ArcGIS. First, I will like to know if it's same thing as the usual wgs84 UTM 30N or what is it? Please, how can I deal with this?

Thanks in advance.

Re: Where can I find this coordinate reference system (wgs84 30N CM 3W) in ArcGIS?

CharlesPreppernau — Mon, 11 Mar 2019 23:10:59 GMT

Hello,

"CM" probably refers to "central meridian". The central meridian of UTM 30N is 3°W, so it seems a good bet that WGS 84 UTM 30N is the correct coordinate system. You should be able to verify this by doing the following:

Use "Define Projection" to assign WGS 84 UTM 30N to a copy of your data.
Load the result in a map and check that it agrees with either a base map or with data for which you know the correct coordinate system.

-Charles

Re: Where can I find this coordinate reference system (wgs84 30N CM 3W) in ArcGIS?

Elijah — Wed, 13 Mar 2019 15:10:20 GMT

Thanks Charles. Your explanation was helpful.