update commonplace POI for 911 CAD system ( part 4 ) large city

Question

Large city LA has 1 million address, estimate to have 4000 x 100 = 400,000 commonplace or POI

Don't collect all 400k POI at once, break them down into small grid.

 

 

 

Example 1:  Microsoft commonplace POI 

This is national grid USNG with 100meter x 100 meter. Each grid has grid number which is USNG number. 

This grid number :  11S LT 832 673

I collect 17 poi. 

 

 

 

Example 2:  Google commonplace POI 

 

This is national grid USNG with 100meter x 100 meter. Each grid has grid number which is USNG number. 

This grid number :  11S LT 850 675

I collect 28 poi. 

 

 

 

 

You can choose different size of grid,   for example small box is 100 meter,    bigger box is 1000 meter, etc... 

https://transparentgov.net/json2tree/esri/server/folder2.html?org=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices&url=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices&arcgis_online_token=&timeout=9000&select_folder=9&select_layer=3&select_folder_text=Basemap_and_Grids+%3Csup%3EMapServer%3C%2Fsup%3E&select_layer_text=3+%26%23x21E2%3B+USNG+1000M+%3Csup%3EFeature+Layer%3Csub%3E+esriGeometryPolygon%3C%2Fsub%3E%3C%2Fsup%3E

 

 

 

Use each grid number as file name of downloaded POI geojson file.

Open ArcPro, add all those grid-number.geojson into single layer, then you have all 400,000 point in a single POI layer . 

 

This is bigger size grid 1000 x 1000 meter

 

I collect 287 commonplace in this bigger box