topic Re: Extract Spatial Reference of Shapefile Using API for Python in ArcGIS API for Python Questions

Extract Spatial Reference of Shapefile Using API for Python

Anonymous User — Thu, 23 Feb 2023 18:04:35 GMT

Hello Esri Community,

I'm working on a project where a user submits a shapefile to a website and among other things, the spatial reference of that shapefile will be stored.

Is there any way I can extract the spatial reference of that submitted shapefile? Since we're not using ArcMap nor ArcPro, we can't use arcpy unfortunately - It must be done through API for Python.

Attached below is a sample zipped shapefile that I'm currently working on.

Any help on this is greatly appreciated!

Regards,

Mina

Re: Extract Spatial Reference of Shapefile Using API for Python

Clubdebambos — Fri, 24 Feb 2023 09:41:17 GMT

Hi @Anonymous User

The below assumes the shapefile is available in AGOL.

Use the shapefile item id

from arcgis.gis import GIS ## connect to agol agol = GIS("Your AGOL URL", "username", "password") ## access the shapefile item item = agol.content.get("shapefile_item_id_in_agol") ## print the spatial reference print(item["spatialReference"])

Re: Extract Spatial Reference of Shapefile Using API for Python

JamesCrandall — Tue, 28 Feb 2023 20:18:08 GMT

Isn't the projection info found in the SitesForDemo_NAD83_Snapped.prj file that's packaged up in the zip file? I guess without arcpy you would have to temporarily unzip that file and read thru it to locate: PROJCS ["NAD_1983_2011_UTM_Zone_11N"

However, there's nothing that says/guarantees that what is being uploaded will contain that .prj file and you would have to handle that in your code.