Questions tagged [elevation]
The vertical distance of a point or object above or below a reference surface or datum (generally mean sea level).
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geotiff.js - Elevation at point in DEM raster seems to be null
When reading COG (Cloud Optimized GeoTIFF) or original GeoTIFF of a DEM/DTM (elevation map) file using Geotiff.js directly or geoblaze, elevation at a point through conversion of coordinates to pixels,...
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Calculate elevation of end points of lines based on slope of Z-aware line FC
I am wondering how it is possible to add an elevation value to a line end point based on the slope of an existing Z-aware line feature class and where they connect.
I have a line feature class in ...
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County mean elevation data [closed]
I'm new to ArcGIS Pro and I'm trying to extract the mean elevation data for US counties. I'm using arcpy to get the data using python. I downloaded the shapefile data from USGS and created a feature ...
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Google Earth Engine - slope
I am trying to use the pre-built function of GEE for calculating the slope of the terrain, but I cannot really understand how the function works, since the documentation is also not really helpful.
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Algorithm for calculating line of sight [closed]
I've been working on implementing a Line of Sight calculation tool, but the results often appear incorrect. I am unable to use other libraries or tools to do the calculations, so please do not ...
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Creating color physical map using SRTM V2 GeoTIFF tiles in QGIS
Trying to make a physical map (don't pay attention to the colors, I'm experimenting). The map is based on DEM SRTM V2.
But I have experienced some trouble with making a smooth transition between ...
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Exporting binary file from Google Earth Engine
For a hobby flight simulator C++ project, satellite RGB and elevation data is needed. Since a few days I am trying Google Earth Engine. It is amazing at showing the data as a map. I see GeoTIFF export ...
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Which online APIs return elevation data without the height of trees and buildings?
I work on applications that generate topographic maps and analyze GPS tracks. My main concern is the presence of "bumps" due to the height of trees and buildings returned by the elevation ...
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Convert unit vector from body to ECEF coordinate system
I have an Android phone using local coordinate system as shown on the picture:
"Азимут" is azimuth.
"Угол места" is elevation.
"Крен" is roll.
Azimuth is measured from ...
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Calculating slope using the 3*3 window approach for elevation data
I have some DEM grid data (25x25, 625 pixels) and I am trying to figure out the correct formula for calculating slope for each pixel. Some googling gave me a bunch of different formulas, but I've ...
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QGIS z value, MSL vs HAE
I have been using Qfield to collect field locations (x,y & z) with a GNSS receiver. I can correct for the antennae height within the app (trimble mobile manager), so that that when QGIS records ...
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Get elevation from multiband GeoTIFF
I got this multi-band GeoTIFF from a government agency explicitly mentioning it referred to elevation in meters. But how do I combine the values of each band pixel into the elevation?
What's the ...
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Creating a heightmap from hillshade/radar data?
So there are several threads explaining how to create a hillshade map from DEM. Does anyone know of a method to do the opposite? Essentially all I have is unidirectional radar data which functions ...
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Error: Computed value is too large, while trying to extract all the elevation values in GEE
I am trying to extract all the elevation values of a region using the NASA SRTM Digital Elevation 30m data set as a CSV file. But it is showing the error FeatureCollection (Error)Computed value is too ...
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How to avoid the negative values in Raster extraction [ example -32767] in QGIS
I 'am trying get a raster values as xyz format for ground terrain analysis using QGIS software,
After extracting raster data,few cells are showing -32767 values, how to get rid of these negative ...
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How to correctly set the depth in 3D EBK in ArcGIS Pro
I'm trying to run the 3D EBK in some geological data, with latitude, longitude, and elevation:
but the semivariograms are quite bad:
But, if instead of the elevation I use the depth, the model is ...
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Google Earth elevation: differences between Google Earth Pro and elevation extracted with GPS Visualizer
I've noticed that when using Google Earth Pro I can see ground elevation data even in streams a few meters wide (different elevation values along the embankment and along the creek bed), while when I ...
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How can I calculate the nearest 3D distance (x, y, z) between points in Qgis?
I'm new to Qgis.
I have two point groups. One is the points representing the road with an interval of 1 m, and another is the forest area.
Each point has x, y, and z values.
I want to calculate the ...
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Negative elevation results from USGS 1 meter DEM [closed]
The USGS 1 meter Digital Elevation Model will return negative elevations. The elevations are based off NAVD88. The negative elevations appear to be near/over water along coastal areas. This DEM is ...
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Query UTM grid for elevation at specific lat/lon coordinates
I need to query UTM grid data (25 meters) for elevation at specific coordinates in lat/lon form.
The UTM data uses the following proj parameters: +proj=utm +zone=32 +datum=WGS84 +units=m +no_defs.
I ...
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Measuring study area of elevational ranges in raster file in QGIS
I have a DEM layer with elevation ranges of -413-5593 m, just as seen below.
Then I determined the altitude between 4100 and 5400 m using symbology and band rendering, got the map below and the ...
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Lower or smoothen elevation data/DEM [closed]
I have a linear.shp that represent a road about 20m in width. It is going across tall mountains and steep hills (don't worry about the logic on how a road is going over a mountain).
I need to (change, ...
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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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3D- Analysis: Calculate the 3D trajectory distance considering a set of points below the sea level issue
I am trying to calculate the 3D trajectory distance considering a set of points below sea level. I've opted for creating a 2D line that considers the 2D trajectory of the points and then interpolate ...
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Displaying elevation profile of vector layer using QGIS
I am using QGIS 3.28.
I am trying to generate an elevation profile from a vector layer. I typically use the "Profile Tool" plugin to accomplish this task, but I recently learned that QGIS ...
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Polygons from a raster within an elevation range
In the image below I have generated some isolines starting from the terrain model and I have filtered them within a certain elevation range 800 - 1500m of elevation in QGIS.
But I would like to make ...
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Elevation from TIFF file
I am new to QGIS. I have an Excel file with latitude & longitude points and a GeoTIFF (.tif) file. Now I want to get the elevation of all latitude & longitude points in the Excel file. How to ...
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Showcasing multiple rasters in ArcGIS Online
I am trying to visualize a DEM and slope raster in a shared web scene on AGOL so I can turn it to a virtual reality experience. In ArcGIS Pro, I've added the DEM as a ground surface, the DEM again as ...
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Convert datum of elevation data in PostGIS
Is there any specific feature to convert raster values (representing elevation) between basis systems, or do I just have to make do with manually adding the mean offset having looked it up from ...
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How can I get 16 bit global elevation maps?
I'm a 3D artist working on a procedural planet generator, based on colour and height textures from real-life areas. I've been using the GeoTIFF files from NASA Visible Earth, but they all seem to be ...
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Problem to extract elevation values from raster to polylines
I'm trying to automatically assign elevation values (coming from a raster) to a group of polylines. In this case, what I did was:
Load a shape file containing a pipe network (from dxf)
Load a shape ...
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Set MIN\MAX height of elevation map (PNG) in QGIS [closed]
How exactly can I
set MIN \ MAX height (in meters like [0, 1500]) for my height map (PNG) in QGIS
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Rotating contour labels on Canvec layer [closed]
I have created a QGIS map using CANVEC layers including elevation features. The resulting contour lines look good, but the elevation labels are not aligned with the contour lines (see screenshot below)...
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Convert a raster to show count of cells of a given relationship to each cell
Is there a tool (QGIS preferably), that will look at every raster cell, and compare it to neighbouring (1km) cells and populate the value with a value based on relationship.
Example (and indeed the ...
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Feed pixel type of tiles into MosaicToNewRaster()
I am automating the creation a mosaic raster dataset from thousands of individual elevation tiles and am tying to extract the pixel type metadata from the input tiles and specify this pixel type in ...
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Make line feature stick to the ground after changing elevation source in ArcGIS Pro
I need to create an elevation profile using LiDAR elevation data that's higher res than the default used in ArcGIS. When I try to create a line feature with 3D properties, it doesn't drape over the ...
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How can I transform northing and easting from UTM zone 32N to WGS84 in an .xyz file without losing the z-values In QGIS?
To keep my drone (DJI Mavic 3 Enterprise RTK) at a constant altitude in very steep terrain, the controller needs a GeoTIFF file with WGS84 coordinates of the mapping area in advance.
I tried the ...
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Finding height profile of region from DEM
I'm trying to work out how to obtain a height profile of a region (a county) from a 50m DEM. I have seen height / elevation profiles for regions created before but don't know how to do it and have had ...
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Reprojecting DEM of Sinai, Egypt-Israel to use in viewshed analysis
I am trying to create a viewpoint on a DEM map of the Sinai with QGIS.
The original DEM downloaded from earthdata.nasa.gov came as CRS WGS84. I cannot use this to make a viewpoint for my viewshed ...
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Using gdal to interpolate elevation from a GeoTIFF
I am new to GDAL and am looking for pointers about the Correct™ way to accomplish a few tasks. I would like to do this in Python, not on the command line.
I have a GeoTIFF that shows elevation at 10m ...
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How to transform from a set of ECEF coordinates to azimuth and elevation?
I have a set of ECEF (X,Y,Z) values for the receiver and a satellite. I would like to compute the elevation and azimuth angles according to WGS84 shape of the Earth.
When we have a WGS84 ellipsoid ...
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Scale y axis on elevation profile chart
I am generating elevation profile graphs from hiking trails (GeoJSON). Use as maximum and minimum values of the Y axis the value of the maximum altitude and the minimum altitude of the route. The ...
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Seeking free tool to create elevation profile for map [closed]
It is a plus if it supports a little bit of programming.
I need a more or less free tool to create an elevation profile of the mountain route - I have a start and end city for this route, also maybe I ...
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QGIS Alter Elevation Values in DEM
How do I add 1.77 to all negative elevation values to increase an overall water depth by 1.77m in a DEM please, i.e. what is the script I would use in the raster calculator?
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Converting elevation between NAD27 and NAD83
I am working with a large dataset which has datum in NAD27 and NAD83. I needed to convert the northing and easting coordinates with the NAD27 datum to NAD83 datum using Geopandas, which I was able to ...
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Extracting different sets of elevation from Google Earth Pro
So far I have found 2 good methods to extract elevation data from Google earth Pro into a CSV file, which can be handled in QGIS. I will describe these methods below. Strangely enough there is quite a ...
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ArcGIS Pro: Creating a elevation profile from line feature, DEM and also a polygon layer inside the graph?
I´m new to ArcGIS Pro and ran into a problem. I have: 1. DEM, 2. Line feature (river) and 3. A vegetation vector layer (polygons).
I would like to make a profile from this line feature (the river), ...
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Nearest neighbour analysis with higher elevation using QGIS
How do I calculate the flow that goes through the rainfall drainage points under a railway?
I have two layers:
DT: Point layer with drainage information: DT_id and elevation.
ACA: Point layer with de ...
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Average slope (in °) for each area
I have nationwide areas I want to get the average slope in ° in a south-north line for each area. I found something about zonal statistics in QGIS and DEM (enter link description here) but returns ...
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How to convert DEM with vertical DATUM DHHN2016 height EPSG:7837 to EGM96 height - EPSG:5773?
There is a lidar data source of digital elevation model of Germany.
The spec of the lidar data is:
Horizontal CRS: EPSG 25832
Vertical DATUM: EPSG 7837
I have anther DEM whose vertical datum is ...
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