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Coordinate Reference Systems

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I have a raster DEM that has the vertical coordinate system NAVD88 (height) with linear units Meter.      I would like to convert the linear units to US_Feet. As far as I know, ArcGIS does not support conversion between vertical datum. Since the datum remains the same (NAVD88), I assume I can use raster calculator to apply the following… (Show more)
in Coordinate Reference Systems
Hello! I would like to calculate distances between different pairs of cities that are almost at their antipodes. I was wondering if ArcGIS takes into account that given that the globe is not flat, there is two ways to reach the antipodes and one option is shortest of the other. For example I can calculate the distance from Lisbon to Auckland with… (Show more)
in Coordinate Reference Systems
The North American Terrestrial Reference Frame of 2022 is Replacing NAD83
North American Terrestrial Reference Frame 2022 i...
My team is looking for a new member. Here's the job posting    Feel free to contact me for more details or questions, but all resumes must go through the usual submission process (via the Careers website).   OVERVIEWDo you think map projections are cool? Know what a datum is? As a projection engine product engineer, you will help build and… (Show more)
in Coordinate Reference Systems
I am currently trying to establish the proper Projected Coordinate System for features that span Washington, Oregon, and California. I wish to preserve area and length if possible. I thought that UTM zone 10 may not cause too much distortion in the southern/eastern end of the states. Any suggestions for optimal projections would be super helpful!… (Show more)
in Coordinate Reference Systems
While fine-tuning a technical workshop for next week, my co-presenter and I realized that our comment of "don't forget these knowledge base articles!" (see terminology note below) wasn't very helpful. You used to be able to go to and type in a knowledge base/technical article number like 23025. That would bring up "FAQ:… (Show more)
in Coordinate Reference Systems
Looking for more information about the optional install of coordinate systems. The What's new document for Desktop 10.5 document says this: ArcGIS Coordinate Systems Data—Contains the data files required for the GEOCON transformation method and vertical transformation files for the United States (VERTCON and GEOID12B) and the world (EGM2008).… (Show more)
I'm updating my script which reads a spreadsheet of values including coordinates but the spreadsheet is not formatted as a table par se. Instead of projected X and Y coordinates, I'd like to move to the user inputting a single MGRS value for each coordinate/position required. This requires conversion back into X and Y values for the… (Show more)
in Coordinate Reference Systems
Hello,   I am using ArcMap 10.4.1.   I have been learning about the subject of coordinate system concepts such as datums, transformations, projections, maps, grid, ground, etc.  While developing practical exercises for myself, I have come to the realization that ArcMap may be my only resource for properly transforming and projecting between… (Show more)
in Coordinate Reference Systems
My map is in NAD1983 UTM Zone 9N.  I am importing a raster that (when opened on it's own) looks fine and is in WGS84.  When I add the raster to my map, it projects incorrectly.  Any suggestions on how to start resolving this would be greatly appreciated.  The raster was exported from Q.
in Coordinate Reference Systems
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