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Questions tagged [vertical-transformation]

The tag has no usage guidance.

2
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2answers
28 views

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 ...
4
votes
1answer
64 views

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 ...
2
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0answers
33 views

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 ...
4
votes
1answer
73 views

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 ...
1
vote
1answer
157 views

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 ...
2
votes
2answers
717 views

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?
4
votes
1answer
109 views

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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0answers
80 views

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 ...
1
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1answer
171 views

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 ...
3
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0answers
113 views

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 ...
2
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2answers
1k views

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 ...
0
votes
1answer
66 views

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 ...
1
vote
1answer
199 views

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 ...
0
votes
1answer
271 views

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 ...
1
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0answers
128 views

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 ...
5
votes
1answer
351 views

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.
3
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1answer
581 views

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 ...
6
votes
3answers
2k views

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 ...
3
votes
1answer
396 views

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 ...
0
votes
1answer
39 views

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 ...
6
votes
3answers
337 views

Vertical datum query for coastal modeling

This may be very specific. 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 ...
6
votes
1answer
2k views

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 ...
5
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1answer
1k views

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 ...
2
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0answers
396 views

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.
7
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3answers
3k views

Vertical Datum Conversion Utilities

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. I would appreciate it if people could provide some ...