Merge pull request #33450 from dimagi/mk/add-geospatial-readme

Add geospatial README

corehq/apps/geospatial/README.md

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+# Setup Test Data
+
+To populate test data for any domain, you could simply do a bulk upload for cases with the following columns
+1. case_id: Blank for new cases
+2. name: (Optional) Add a name for each case. Remove column if not using
+3. gps_point: GPS coordinate for the case that has latitude, longitude, altitude and accuracy separated by an empty space. Example: `9.9999952 3.2859413 393.2 4.36`. This is the case property saved on a case to capture its location and is configurable with default value being `gps_point`, so good to check Geospatial Configuration Settings page for the project to confirm the case property being used before doing the upload. If its different, then this column should use that case property instead of `gps_point`
+4. owner_name: (Optional) To assign case to a mobile worker, simply add worker username here. Remove column if not using
+
+For dimagi devs looking for bulk data, you could use any of the excel sheets available in https://dimagi-dev.atlassian.net/browse/SC-3051