-
UC 2026 presentations and more!
Hello everyone! If you are going to be at UC 2026 in person or attending virtually, we have a custom agenda of coordinate reference systems/transformations events. 2026 Esri UC Sessions on Coordinate Systems One technical session will be live streamed: ArcGIS Pro: Preparing Your Data for the NSRS 2022 Shift We also have a…
-
The vertical transformations WGS_1984_To_EGM96
Hi, a little out of curiosity and also previous possible bad habits on my side. Several clients in dronemapping will need to apply vertical transformations from WGS84 heights to NN2000 heights via EGM96. I notice 3 methods are mentioned in the geographic_transformations.pdf document: Transformation_name WKID Accuracy…
-
Calculating a centroid in GCS vs PCS
Hello, I'm using ArcGIS Pro to calculate the centroid of a polygon in both geographic (WGS 1984) and projected (WGS 1984 UTM Zone 30 North) coordinate systems. I understand that the actual location of the centroid will be slightly different between the two, even though the lat and long are almost identical. However, when…
-
Questions about area calculations in ArcGIS Pro
Hello. I am new to this community and I am not an expert in coordinate systems or projections, so please pardon my ignorance on these topics. I am, however, a long term ArcGIS user (using Pro now for several years) and I would like to try to get an authoritative answer about something that has been confusing me for years.…
-
Google coordinates to UTM coordinates in Dubai
Hii... can anyone help me to convert the google map coordinates to UTM coordinates that are used in Civil drawings in Dubai. I tried to convert but its not working. Please suggest how to do that. Thanks in advance
-
Effects on Horizontal Coordinate System When Changing Vertical Coordinate System?
I work for a wastewater utility in Nebraska, USA, and we are beginning to try to visualize our sewer network data in three dimensions. Our sewer data has historically been projected in the NAD 1983 StatePlane Nebraska FIPS 2600 (US Feet) horizontal coordinate system (WKID: 26852), and while we have used the NAVD88 height…
-
Prepare your data for the National Spatial Reference System modernization of 2022 in the U.S.
To read this article, click on the image, or open this link.
-
Difference between NAD_1983_CSRS_MTM_9 and NAD83(CSRS) / MTM zone 9 ?
Hi, I would like to know if there is a difference between NAD_1983_CSRS_MTM_9 and NAD83(CSRS) / MTM zone 9 coordinate systems in ArcMap 10.6. Here are the characteristics for NAD_1983_CSRS_MTM_9: Projected Coordinate System: NAD_1983_CSRS_MTM_9 Projection: Transverse_Mercator False_Easting: 304800.00000000 False_Northing:…
-
NAD83 to NAD83 2011 transformation methods
Good afternoon and thanks in advance for your help! I have a few questions about the transformation options that show up in the list in both ArcMap and Pro. Data Frame: projected state plane coordinate system that uses the NAD 1983 2011 datum The Data: projected state plane "vanilla" NAD 1983 I have been researching for…
-
project on the fly warning symbol in Edit group of Contents Pane
I am encountering an interesting issue with the project on the fly warning showing up in ArcPro editing group even though the layers are projected to the same spatial reference. I have tracked it down to the difference between NAD 1983 UTM Zone 11N and NAD_1983_UTM_Zone_11N (spaces vs underscores in the name of the…
-
ArcGIS coords don't match Google Earth
I am looking for a village in Indonesia. The coordinates given are S 0 deg, 18'; E 130 deg, 40'. On gEarth, it shows a village in that location. In Pro 2.9, that position is in a different place and there is no village according to the imagery basemap. Can anyone help me understand why the coordinates don't match? Or…
-
Best practices for handling time-dependent datum transformations (epochs) in ArcGIS pro
Hello, I would like to understand how exactly time-dependent transformations work in ArcGIS Pro - in relation between the reference map and to the actual dataset in order to identify good data management/handling practices. Quick background info: Both WGS84 (ITRF2014) and ETRS89 (ETRF2000) are going to be used for a…
-
Projection on the fly in the map vs. in the database
Question to the community and @MelitaKennedy regarding "projection on the fly". Projection on the fly is magic. However, I've had many colleagues over the years apply this projection on the fly magic concept to copying features from a feature class in a projected coordinate system (PCS) and pasting them directly into a…
-
Define Projection/Unknown Coordinate System
@MelitaKennedy An issue that came up when I was working on the Geologic Mapping Template a long time ago at Esri has resurfaced. The issue had to do with providing a 'template geodatabase" that contained a feature dataset with a spatial reference of "Unknown Coordinate System" that would later be set by using the "Define…
-
Help witht Coordinates
Hi everyone Can anyone make heads or tails with these coordinates? It is from a survey of a lot that I need to map into a BIM program as a site plan and I am deeply confused! The distance between points is clear but the remainer (mainly how the coordinates are written) is quite unclear to me. Thank you in advance !!
-
Transformation from NAD83(2011) to NAD83(86)- ArcGIS vs. NGS NCAT
I am working to resolve a transformation issue from KY Single Zone, US Survey Feet, NAD83(2011) to NAD83(86). Unknowingly, I have used NAD83(86) for several datasets where I should have used NAD83(2011). Using the transform features tool in ArcGIS Pro 2.9.2, I have transformed the data in a series of steps from EPSG 6473…
-
ERROR 000365: Invalid geographic transformation. Failed to execute (ProjectRaster)
Hello, I have built a script allowing for any user to go from an LAZ file format to a fully projected DEM. It works flawlessly (LAZ -> LAS -> DEM) until it gets to the projection portion. For some reason, the script does not allow for projection while using the Python Command Prompt and returns ERROR 000365, but as soon as…
-
NAD 1983 CSRS and transformations...
Hello my fellow Canadians! Lately I have been researching more and more about transformations from NAD 1983 GCS to NAD 1983 CSRS GCS, and then NAD 1983 CSRS into WGS 1984 Web Mercator (auxiliary sphere), and the more I read, the more confusing it gets. There are a few articles I have found, but they seem to be dated. This…
-
GDA2020 & WGS84 (Web GIS)
(June 2021) Many of our Australian clients have now commenced or are contemplating moving their data from the GDA94 datum to Australia's modern datum GDA2020. The challenge with this move has been, that there was not a direct transformation between GDA2020 and WGS84. Data had to be moved through GDA94 to publish to WGS84.…
-
Vertical datum conversion in ArcGIS Pro not recognizing vertical coordinate system
I have a GeoTiff surface model and the z values reference EGM96. I would like to use the vertical datum conversion capabilities in ArcGIS Pro 2.7 to convert the GeoTiff to reference the NAVD88 vertical datum. I see that the *Project Raster* tool includes a checkbox for applying vertical transformations. This checkbox…
-
Vertical Datum Transformations: CGVD13 to WGS84
Hello, I'm wondering if it is necessary to apply a transformation from CGVD13 to WGS84? I have a large dataset of hydrographic soundings obtained with GCS WGS84 and a reference water surface elevation (WSE) obtained with CGVD13. I need to subtract the WSE from all depth soundings to get a true bed surface elevation. I…
-
Transform MANUALLY WGS84 to NAD83 CSRS
Hi, I wanted to use the coordinate frame rotation method to transform MANUALLY WGS84 to NAD83 CSRS. Some of the parameters to do so are given in meter (dx, dy and dz). I tried many times to do this transformation using the formulas for this method. But no result concords with the values given by ArcGIS when I do this…
-
1983 datum with 1993 corrections
Hello! I'm trying to map point from survey plats that are using a state plane coordinate system with 1983 datum with 1993 corrections. With further research it seems they would fall under 1883 HARN, but this is still visually off by 500 yards or so. Does anyone have another idea of the datum I should use or have…
-
Subtract geoid undulation grid data from GNSS z-values for height correction?
We are looking into more low cost GNSS rover devices which unfortunately only measure ellipsoidal heights. To use those for mapping applications, we have to post-process those heights to receive orthometric heights (MSL). I have now received an official ascii grid file with the geoid undulation values. The distance between…
-
Georeference Box - Text Box value?
Hello all, I have a question about scale tool of the georeference box. What type of value can I add in the in the adjacent text box on the toolbar? percent? Numeric between ? to ?. Thank you!