Questions tagged [vertical-transformation]
The vertical-transformation tag has no usage guidance.
50
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Vertical datum transformation with PyProj returns same elevation
I am trying to develop Python code to do a vertical datum transformation between WGS84 (GNSS elipsoid height) to NAVD88 geoid height. I have seen and copied the code from @asynchron located in the ...
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"Vertical and linear units in the X,Y, and Z coordinate systems are not the same" error in a task process
I am having a CS issue for my LASD dataset. I'm trying to run a tool in ArcGIS Pro that will analyze my LiDAR dataset (about 100 tiles) and create tree points based on the clustering of classified ...
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32
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Apply custom vertical datum transformations to point cloud
My goal is to write a script that can add the geoidal undulations contained in a TIFF file (local geoid model) to a point cloud. I wrote the script below in Python that should perform this task using ...
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How to convert elevation data from WGS84 ITRF2008 to NAD83 CGG2013a
I need to convert elevation data captured in WGS84 ITRF2008 to NAD83 CGG2013a.
I came across with GPS-H from NRCAN and downloaded the Geoid Model file (CGG2013ai08.byn) from here.
Although I use a ...
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Vertical transformation of DEM from EPSG:3035 to EPSG:4326
I am trying to convert a DEM file from EPSG:3035 (ETRS89-extended / LAEA Europe) to EPSG:4326 (WGS 84) with gdalwarp. EPSG:3035 uses the European Terrestrial Reference System 1989 ensemble datum where ...
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1
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216
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GDAL API WGS84 to NAD83 with NAVD88
I am trying to figure out how to do a vertical transformation using the GDAL API. In my case I'm using a C# wrapper for the GDAL API, but if answers are given in C++ or python I should be able to ...
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1
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373
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PDAL filters reprojection is not changing Z values
I'm trying to reproject an LAS file using PDAL, and it looks like the X/Y values are being transformed, but the Z values are staying the same.
pdal translate input.las output.las -f filters....
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1
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375
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Transforming EPSG:4979 to given WKT (~EPSG:6654)
I am setting up a GIS to transform points defined in lon/lat/z (referenced to WGS84, or in EPSG:4979) to an input .laz/.las file coordinate system. I've handled reading the wkt from laz/las files with ...
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420
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Vertical Datum transformation for raster using ArcGIS Pro
I have a DEM raster file on WGS84 CRS and height referenced to ellipsoid on same datum. I want to convert that DEM to local CRS (horizontal & vertical) including the vertical datum transformation. ...
- 1,078
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126
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Does changing the Vertical Coordinate System of a LAS file changes the actual height/elevation values?
I would like to know should/does the original height values get updated if I change the vertical coordinate system.
I already have the las dataset in WGS 1984
Now, I used the Extract LAS ...
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429
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Vertical datum transformation in ArcGIS Pro
I'd like to compare USGS 3DEP DEM with SRTM DEM for western U.S.. I did some research here, and find out that I need to match their datum (from NAD83-NAVD 88 to WGS84-EGM 96) before comparing the ...
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70
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vDatum returns error at Linux command line - fails to accept parameters with GUI
I am trying convert a GeoTiff using VDatum at the Linux command line.
My data reference the Washington State Plane South CRS with z values referencing EGM96. I would like to convert these z values to ...
- 9,207
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1
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753
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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 ...
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88
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Identifying undefined vertical datum
I was given two DEM files covering the same area of Northern California (lets call them File_A and File_B). They're derived from LiDAR that was flown separately in the last 10 years. My goal ...
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330
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How to transform ERA5 vertical datum to WGS84
I am trying to plot a netcdf file from ECMWF ERA5 in a folium map but I am having troubles with the projections in the file.
ECMWF documentation states:
ECMWF data is referenced in the horizontal with ...
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350
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PostGIS ST_Transform seems to treat the vertical datum but not the equivalent pyproj Transformer, even so they both rely on Proj
I've narrowed down a problem I met when processing some points having altitude values to the following:
It seems that PostGIS and pyproj do not treat the vertical datum in the same way but both are ...
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Specifying geoid grid for osr.SpatialReference instance
How can I specify e.g. Geoid 12A or Geoid 18 when (for example) converting NAVD88 orthometric heights to ellipsoid heights using the OSR Python bindings?
I would like to be able to specify any .gtx ...
- 516
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71
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ArcGIS automatically converting Z units when no Vertical CRS is defined
I have seen this on several tools, but it was most obvious to me when using calculate geometry in the attribute table.
I have a point dataset that has Z values, but no VCS defined. I then used ...
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1
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418
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Workflow in ArcGIS Pro for WGS84 EMG2008 to NAVD88 Elevations
Can someone walk me through their workflow to obtain NAVD88 elevations in ArcGIS Pro starting with WGS84 elevations (EGM2008 ellipsoid for heights)?
It would have to be something like the below, but ...
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322
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Convert heights from DHDN Gauß Krüger Zone 4 to UTM 32 ETRS 89 in pyproj
I am using pyproj.
X/Y conversion is pretty straightforward through
transformer = Transformer.from_crs(31468, 25832,always_xy=True)
However, this does not transform the heights.
From
Vertical ...
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3
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1
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467
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Gravity related height from ellipsoidal height using pyproj
I'm using the pyproj library (http://pyproj4.github.io/pyproj/stable/index.html) to get translate ellipsoidal heights into gravity related height.
Code:
from pyproj import CRS
from pyproj import ...
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Vertical Datum transformation using Pyproj
I have been using Pyproj for some time now doing only simple projection and transformation. I am totally new to vertical datum and differences in GEOID among Coordinate systems.
I have been trying to ...
2
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2
answers
576
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is there a way to manually stretch a polygon?
I have this polygon that I want to manually fit and resize(without entering affine numbers, just resizing it with my mouse).
Is there a way to do it?
- 507
3
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1
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171
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What XY coordinate system goes with EGM96 when projecting elevation raster in ArcGIS Pro?
I am using ArcGIS Pro 2.3.1.
I have an elevation raster in WGS84 and a national Z coordinate system. I need to project this DEM raster to the EGM96 Z coordinate system.
Which XY coordinate system ...
- 353
1
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1
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451
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Converting the vertical datum of elevation data in R
I have elevation data for 699 points around Australia. I want to calculate the difference between these point elevations and the highest elevation within 25 nautical miles - in simple terms I want to ...
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2
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2
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272
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Height transformation parameters between any model and EGM-96
Dear Mr/Mrs Geodesy Engineers
I have a quite deep question here,
AIP data locations are determined by geographic coordinates /X & Y axis/ and vertical values /Z axis/ via Geodesy science.
ICAO ...
- 121
5
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1
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277
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Using NAVD88 geoid in Northern Canada?
The USGS NED (1-arcsec) dataset is available for the continental US as well as most of Canada. It is based on the NAVD88 vertical datum.
I am interested in using the DEM to orthorectify SAR scenes in ...
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82
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Sentinel 1 (A and B) Vertical Datum
I have been working through the ASF's "Recipes" for the creation of a DSM from Sentinel 1 (A and B) imagery.
I am able to produce a DSM, and am relatively happy with the results in terms of the ...
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4
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1
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459
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Specifying geoid in ArcGIS Raster Project tool?
Background:
ArcGIS Desktop 10.6, Spatial Analyst
I have two bare-earth DEMs, derived from lidar, acquired on different dates. I need to subtract one DEM from the other as part of a stream erosion ...
- 7,940
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1
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923
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Trimble 7X GNSS point Z returns negative elevations
I have a newly acquired Trimble 7X (with a centimeter kit). I collected a point in an area with a clear view of the sky. The accuracy indicator showed 1" accuracy and post processing and a ...
- 9,207
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2
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2k
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Converting vertical datum from WGS84 to EGM96 in ArcGIS Desktop?
I am comparing two different Digital Elevation Models
SRTM (Datum: EGM96)
Cartosat (Datum: WGS84)
How to convert WGS84 to EGM96 in ArcGIS Desktop?
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489
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Analyze the extent of a NTv2 grid
I am using a NTv2-grid for transformation of geodata.
The grid can be found here:
gsb-file:
https://www.lgl-bw.de/lgl-internet/web/sites/default/de/05_Geoinformation/Galerien/Dokumente/BWTA2017.zip
...
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2
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126
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Completing Coordinate transformation?
I have two airborne lidar datasets and, for purposes of comparing change between the two, would like to standardize the vertical and horizontal coordinate information for each. The plan is to ...
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1
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336
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dxf rotation and georeference [duplicate]
I have a DXF (layout) which is to be spatially adjusted to a point shapefile that has correct X Y cords.
When I add both as vector layers to Qgis, point shapefile is right on place but dxf shows a ...
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269
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NOAA vDatum which WGS84(*) reference for data created using ESRI WGS 84 [closed]
I have an ESRI shapefile that use the WGS84 using latitude and longitude. The ESRI text for this coordinate reference system refers to EPSG 4326. The Z values reference the NAVD88 vertical datum and ...
- 9,207
2
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2
answers
7k
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Convert Geoid File Types
Anyone know what I can use to convert a geoid surface stored as , BYN into .GTX for use with PROJ4?
The CCG2013A vertical datum and geoid model from NRCan is only available, as far as I can find, in ...
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134
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What vertical datum for OpenDroneMap with no GCP
I am processing drone imagery with OpenDroneMap using a native Ubuntu installation of OpenDroneMap. I see the the LAS generated returns points in UTM for X and Y coordinates as stated in the ...
- 9,207
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2
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451
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NOAA vdatum GDAL Variable Paths for Linux Ubuntu
I want to do vertical datum conversions on geotiffs using NOAA vdatum
The conversion status menu shows no progress and no conversion happens.
I see that Microsoft Windows needs GDAL environmental ...
- 9,207
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690
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Procedure for converting NAD83 to NAD83 1992 epoch (1991.35)?
I am attempting to convert a shapefile from NAD83 HARN / egm96 vertical to NAD83 1992 epoch (1991.35) / NAVD 88 vertical. I have attempted to use NADCON to no avail. I know I can use the Define ...
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254
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Converting vertical coordinate system of LAS dataset? [duplicate]
I want to overlap both LiDAR data and SRTM data but they use different vertical coordinate systems.
I am using ArcMap 10.2 and I firstly created a LAS dataset and original vertical coordinate system ...
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1
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2k
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Vertical Datum and Projection
Does vertical datum get projected? I feel a bit confused with the concept of the vertical datum and doing a projection.
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NED (NAVD88) to WGS84 heights
I need to convert the 1/3 arc second DEM files from the NED into WGS84 ellipsoid heights. The documentation says that the NED is referenced to NAVD88. I've tried using gdalwarp as follows:
gdalwarp ...
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5
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Vertical Datum conversion of a raster with gdal
Is there a tool available in gdal to do vertical datum conversion of a raster DEM? I'm looking for a single command line to execute the vertical datum conversion of a raster like the las2las of Liblas ...
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1
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602
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VDatum helmert transform parameters
I'm trying to use NOAA's VDatum to verify the NAVD88 -> WGS84 datum conversion in a c++ datum conversion library that I've written.
The answers didn't agree, so I attempted to check a simple ITRF2008 ...
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48
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Combining two z values with same x and y in ArcMap?
I have a point file with elevation values I want to combine with a raster of the same area. I'm assuming I will need to extract points from the raster to store as a .shp file.
Then I need to combine ...
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3
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497
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Vertical datum query for coastal modeling
I have a USGS derived DEM with a vertical datum of EGM96 from NASA satellite data. My Bathymetry uses a lowest astronomical tide datum.
Has anybody come across this or similar issue before?
I need ...
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Canadian Geodetic Vertical Datum of 2013 (CGVD2013)
"Natural Resources Canada (NRCan) has released the Canadian Geodetic Vertical Datum of 2013 (CGVD2013), which is now the new reference standard for heights across Canada. This new height reference ...
- 28k
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Can GDAL Perform Vertical Transformations?
Can GDAL perform vertical transformations?
If the answer is yes, please indicate which amongst these listed pages can explain how exactly to accomplish vertical transformations?
If there is some ...
- 161
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602
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How do you compute vertical transformations in QGIS?
How do you compute vertical transformations in QGIS?
Ideally, the procedure / plugin will allow the loading of sundry geoid models.
- 161
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4
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5k
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Vertical Datum Conversion Utilities [closed]
I have some data (points and rasters) that I would like to be able to convert to and from several vertical datums, including MLLW in coastal Florida.
Can you provide some insight into accuracy, ...
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