2

I downloaded GIS data from IPUMS NHGIS. The polygons points are for example: "[-1967092.8957,1446306.6612]" I attempted to convert automatically in https://mapshaper.org/ using "-proj wgs84" but it does not work. What coordinate system is this?

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8
  • 1
    what location does it represent?
    – mkennedy
    Nov 13, 2023 at 2:28
  • 1
    I see by the ZIP code that it's on the west coast of the US. Definitely not in geographic CRS (latitude-longitude). Is there a .prj file with the GIS data download?
    – mkennedy
    Nov 13, 2023 at 2:51
  • 5
    Go back to the source and read the metadata (a prj file like @mkennedy said would be pertinent metadata). Do not try to quess what it could be reshearch what it is. Nov 13, 2023 at 4:49
  • 2
    If you can't find metadata but you can point the location on a map then you may be able to find the coordinate system with this application projfinder.com.
    – user30184
    Nov 13, 2023 at 7:21
  • 1
    Please post a link to your data.
    – Pointdump
    Nov 13, 2023 at 7:30

1 Answer 1

5

On the IPUMS NHGIS website they say:

"We project the data into Esri's USA Contiguous Albers Equal Area Conic Projected Coordinate System"

So that would be ESRI:102003 NAD 1983 Albers contiguous USA.

Center of your Area of Interest would be Latitude,Longitude of 48.027,-122.448.

enter image description here

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