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1942
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location Redlands, CA
age
visits member for 4 years, 8 months
seen 10 mins ago

I've been working with map projections and datum transformations for years, including in ArcView GIS, ArcInfo 7 and up, MapObjects, and ArcGIS.


4h
comment Convert shapefile to WGS84
Note: The WKID is EPSG:2263, NAD83 / New York Long Island (ftUS).
1d
reviewed Close Add (XY) Data in ArcMap is not finding folder connection?
1d
comment Problem loading geojson file on geojson.io
The coordinate values don't make sense to me. They're not latitude/longitude and if they're EPSG:3857, they're offshore Africa, near 0 lat, 0 lon. They're also too small for UTM/GK or State Plane.
1d
reviewed Approve historical tag wiki
1d
reviewed Approve history tag wiki excerpt
1d
reviewed Approve historical tag wiki excerpt
1d
comment Area missing in polygon (Shapefile)
I feel like you should be able to create a big polygon that covers the area of interest, and union the input fc with it. That should create polys in the gap areas which could then be merged with neighbors, etc. Can someone more knowledgeable say whether this is a valid workflow?
1d
comment Export data with data frame coordinate system using ArcPy
@EmilBrundage When you export, you are calling exactly the same process as the Project tool. A difference might be caused by no or a different geographic/datum transformation. Are any applied in the data frame? If so, you probably need to set it in the gp env so the project tool will pick it up. Or specify it in the call.
2d
comment Is it better to take the elevation of a GPS unit or that of a Digital Elevation Model?
@ChrisW You are completely correct, and I'm not sure how I misread it so completely. Original comment deleted.
Jun
26
comment OpenLayers Lat Lon Conversion
Do you know what location this is supposed to be? With that information, we might be able to suggest some possible coordinate reference systems (ex. if in Russia, might be 3857).
Jun
26
answered Why can't I import my shp file into a postgis database with SRID 102631 using shp2pgsql?
Jun
26
reviewed No Action Needed Is there a problem with ArcGIS Pro snapping environment?
Jun
26
reviewed Leave Open Copy column from Excel to attribute table
Jun
26
reviewed Looks OK Copy column from Excel to attribute table
Jun
25
reviewed Approve ArcGIS 10.2: ArcPy - how to replace workspace paths?
Jun
25
comment Getting ArcGIS Desktop to understand LOAC so it calibrates coordinate systems correctly?
If it's an event layer (xy data layer) aka added from a csv or Excel table, re-add it but make sure the coordinate system is set to British National Grid. I think your LOAC data that's in ArcMap is defined as web Mercator (3857).
Jun
25
comment Getting ArcGIS Desktop to understand LOAC so it calibrates coordinate systems correctly?
Ah, does this data have a defined coordinate system? If so, write down what it is, then "clear" or "delete" it in ArcCatalog. Refresh ArcCatalog, then refresh the data frame (F5). Does it line up now?
Jun
25
comment Getting ArcGIS Desktop to understand LOAC so it calibrates coordinate systems correctly?
Right-click Layers at the top of the table of contents and select Properties. Select the Coordinate System tab. In the search box, type 27700 + carriage return, then hit the OK button.
Jun
25
comment Getting ArcGIS Desktop to understand LOAC so it calibrates coordinate systems correctly?
The LOAC data from here says it's using British National Grid via a shapefile .prj file. The basemap is much more likely to be using web Mercator (EPSG:3857 or Esri:102100). Try changing the data frame to BNG (27700) and see if they line up.
Jun
25
reviewed Leave Closed Is there a basic hands-on example of the use of UK GIS data (not in the ESRI native format) being imported for use in ArcMap?