517 questions
1
vote
1
answer
58
views
How to Render Webmaps using Zarr Format for Flood Data?
I have very large Geotiff Files (.tiff) for Flood Data -
$ gdalinfo flood_probability_2023-09-25_88.19823706960149_24.314907220056885.tif
Driver: GTiff/GeoTIFF
Files: flood_probability_2023-09-25_88....
1
vote
1
answer
62
views
How to reduce xarray.coarsen with majority vote?
I'm currently trying to resample a large geotiff file to a coarser resolution. This file contains classes of tree species (indicated by integer values) at each pixel, so I want to resample each block (...
- 13
0
votes
0
answers
42
views
Exraction of single band from tiff file which was exported from SNAP
I am a beginner in Google Earth Engine (GEE) and currently working with Sentinel-1 satellite data. I have used SNAP software to perform various preprocessing steps on the data, including multilooking (...
- 1
0
votes
0
answers
78
views
"terra" fails to compute `sum` with thousands of layers in command-line mode (Rscript)
I'm using terra::rast to load approximately 2,000 raster layers (GeoTIFF). Each raster layer is less than 100kb. When running R on interactive mode, it loads normally and I can then use the function ...
0
votes
1
answer
35
views
Handling mixed datatypes in geospatial data in geotiff file format
I am working with Geotiff file which is 2 byte 2 channel image. I am trying to create third derived channel which is ratio of first band and second band. I am trying to save this band in Float32 ...
1
vote
0
answers
120
views
Unable to import the compressed ZSTD GeoTiff to PostGIS in Python
I would like to import the compressed ZSTD GeoTiff to PostGIS with the following commands (below) but I get this error: RASTER_fromGDALRaster: Could not open bytea with GDAL. Check that the bytea is ...
1
vote
0
answers
90
views
Creating a 3D-Mesh out of a .xyz-file - Python
I converted a GeoTIFF file into a .xyz point cloud. Now, I’d like to generate a simple 3D mesh file, such as .obj or .stl.
I used CloudCompare to manually create a 3D mesh using the PoissonRecon ...
- 11
0
votes
0
answers
64
views
How to correctly convert geo-coordinates (lat, lon) to GeoTIFF pixel coordinates using GDAL in C++?
I'm working with GDAL in C++ and trying to convert geographic coordinates (latitude, longitude) to pixel coordinates in a GeoTIFF file. Specifically, I am using the GetGeoTransform function to fetch ...
- 33
0
votes
1
answer
51
views
How to query the OVERVIEW COMPRESSION type of a GeoTIFF/COG?
We can query the image compression e.g. via gdalinfo img.tif which gives us (among other information) something like
Image Structure Metadata:
COMPRESSION=DEFLATE
INTERLEAVE=BAND
LAYOUT=COG
But ...
- 185
1
vote
2
answers
129
views
Raster not visible in leaflet even though it is visible using plot()
I tried to add a raster file (stored in r_max) to my map.
r_max is a RasterLayer with values from about 0 to 5:
class : RasterLayer
dimensions : 180, 360, 64800 (nrow, ncol, ncell)
resolution : ...
- 11
0
votes
0
answers
66
views
Smooth time-series visualization of COG GeoTIFFs in OpenLayers with WebGL without loading delays
I'm implementing a temporal visualization of water depth data using OpenLayers with COG (Cloud Optimized GeoTIFF) files (large). The user should be able to scroll horizontally to navigate through time,...
- 25
0
votes
1
answer
92
views
OpenLayers: GeoTIFF on top of OSM layer shows large border
I am trying to load a GeoTIFF on top of an OSM layer with the openlayers library (v10.2.1).
The code to load the GeoTIFF roughly looks like this:
this.modelLayerSource = new GeoTIFF({
...
- 537
0
votes
0
answers
301
views
How to download elevation GeoTIFF from Copernicus GLO30 DEM using Earth Engine API for Python?
I was working on a project in geospatial analysis, where I need to download GeoTIFF files for elevation data. I decided to use the Copernicus GLO30 DEM found in Google Earth Engine, because it is the ...
1
vote
0
answers
45
views
Is there a way to use the rstac package with Google Earth Engine?
A bit like accessing the planetary computer or the Earth data from NASA, is there a way to access the Google Earth Engine catalogue with rstac (https://developers.google.com/earth-engine/datasets/...
- 3,843
0
votes
1
answer
128
views
How can I fix this geojson with unwanted vertices?
I'm working with a GeoJSON file that represents the area of the United States at 0 feet elevation. However, when I load it into QGIS, a strange diagonal line appears, stretching across the map. This ...
- 731
0
votes
0
answers
137
views
Problem with rendereing geotiff file in proper bounds with openlayers
I have the code in openlayers 6.
which load the geotiff file - pacific.tif and in some viewers it says it has my projection WGS 84 (my openlayers projection is EPSG:4326).
which load the geotiff file -...
- 129
0
votes
0
answers
50
views
Display cities over .tiff file using Python
I created this .tiff file:
enter image description here
How do I have city labels and county boundaries overlayed on top of it? Like so:
enter image description here
I'd like county boundaries and ...
- 1
0
votes
0
answers
66
views
Openlayers webglLayers band index restriction (4)
I have a "simple" problem to solve: visualize a timeseries of raster data in a web application (using openlayers, if possible). The original format of the raster data is in .asc files. Lets ...
- 25
0
votes
0
answers
77
views
Apply image transformations on Geotiff in c#
I have a Geotiff file and I want to overlay it on a map. For display of the map I am using the GMapControl from GNet. To overlay the image I am using a GMapMarker that I defined and I pass there as ...
0
votes
1
answer
329
views
Converting 1-band DEM GeoTiff to 3-band (RGB) GeoTiff with storing full elevation value in RBG + GeoServer ready
My goal is to host tiles with elevation values in GeoServer.
I downloaded the mapzen tiles (link here: https://www.opentopodata.org/datasets/mapzen/)
Originally downloaded for use in opentopodata. I ...
- 41
2
votes
1
answer
92
views
Cannot convert grib2 to geotiff in SpringBoot app
I have to convert grib2 files to geotiff files using geotools library.
I received a Maven project which does the conversion and isn't SpringBoot-based. I will put only crucial parts of its pom.xml and ...
- 3,411
2
votes
0
answers
516
views
open3D - How to project an image (texture) onto a 3D mesh
I am new to open3D and working on a process to automatically create mesh's of various terrains and apply generated maps on those terrains. I have been using open3D to view the meshes, but I'm not sure ...
- 31
0
votes
0
answers
107
views
How to display a GeoTiff (or other geo-coded file) using DevExpress on WPF C#
I added an offline map file that I have already downloaded in the map control. My application is not connected to the internet and the user needs an offline map with (TIFF/BMP/PNG) extension.
Using ...
0
votes
1
answer
214
views
Is it possible to use a cog RGB GeoTiff with ol-cesium in 3D
I am trying to load a cloud-optimized RGB geotiff, using ol-cesium:
new TileLayer({
source: new GeoTIFF({
sources: [
{
url: "my_rgb_cog.tiff",
...
- 3,244
1
vote
1
answer
266
views
having problem while polygonize raster file (geotiff) with geotools
I have some large geotiff file,size range from 200MB to 10GB.
They are produced by drones following a specific route, capturing images at a certain width.
Here is an example with mosaic:
sample tiff
...
- 11
-2
votes
2
answers
247
views
Changing TIFF image compression type while preserving all tags
Is there a command line tool that will change the type of compression used in a TIFF image without discarding unknown tags? Imagemagick 7.1.1-36 discards GeoTIFF tags when I do the following, despite ...
- 3,967
0
votes
1
answer
197
views
GeoServer Layer Not Displaying Entire GeoTIFF Image
I'm having an issue with GeoServer not displaying the entire GeoTIFF image. The image is about 5.23 GB and displays correctly in QGIS, but when I create a layer in GeoServer, only a portion of the ...
1
vote
1
answer
77
views
Error during exporting of image from Google Earth Engine to Google Drive through Jupyter Notebook
Trying to export a geoTIFF file from Google Earth Engine to my Google Drive using Python code. I'm running it on Jupyter Notebook.
The code works without error.
The problem is that the folder "...
0
votes
1
answer
61
views
Using StreamingRenderer with GeotiffReader
I've been having trouble getting the geotools StreamingRenderer to display an image from a Geotiff correctly. I'm using a visible earth geotiff from nasa but I see this problem with other EPSGE:4326 ...
0
votes
1
answer
66
views
Cannot open geotiffs downloaded with rvest
I am trying to download ~200 geotiffs from NOAA into R using package 'rvest'.
The website with the data is here (https://noaadata.apps.nsidc.org/NOAA/).
NOAA provides instructions on how to bulk ...
- 87
0
votes
0
answers
555
views
How to use gdal_translate in Python
I am trying to convert a netCDF file to a Cloud Optimized GeoTiff (COG) format. I have been able to do so successfully in the OSGeo4W Shell using the following command:
gdal_translate -of GTiff NETCDF:...
- 1,933
0
votes
1
answer
67
views
Unable to Write Metadata to JP2 Files Using PyExifTool
I convert some tiff files to jp2 and I want to copy their metadata on the new files. Here is an example of the metadata from a metadata viewer:
Raster to World Matrix:
Units: Meters
amx[ 0]=0....
- 29
0
votes
0
answers
157
views
How to use geotools to load tif files and generate images using WMS like GeoServer
I want to use geotools to write code to implement geoserver loading tif files to implement wms services. After loading geotools, I performed wms output, but my code encountered two problems: the first ...
- 1
1
vote
1
answer
403
views
Exporting PostGIS Raster Data to GeoTIFF using gdal_translate - Selecting Subdataset Issue
I am trying to export a PostgreSQL table containing raster data to a GeoTIFF file using gdal_translate.
I am looking for assistance on how to specify the subdataset in the gdal_translate command when ...
0
votes
0
answers
196
views
How can I convert GeoTIFF to sqlite database in python
I have a GeoTIFF file that i want to extract its latitude and longitude with altitude and store it in a sqlite database, this sqlite database will be later used in a mobile application,
For now this ...
- 731
1
vote
0
answers
233
views
Color styling for >100 COG GeoTIFF with min/max values in OpenLayers
I have this color style (from 0-90 values range) for a COG GeoTIFF file having a values range between 12 (minimum value) and 50 (maximum value):
const autominmaxrange = {
color: [
'case',
['&...
- 9,255
1
vote
1
answer
210
views
Unexpected behavior when slicing xarray DataArray over the y dimension
I'm new to xarray and I'm trying to understand how sel() works.
I have a DataArray tif_xr that comes from opening a 10 band GeoTIff file with rioxarray.
tif_xr = rioxarray.open_rasterio('path/to/my/...
0
votes
1
answer
698
views
Issue loading GeoTIFF file in local web page - Error: Request failed
I'm encountering an issue while trying to load a GeoTIFF file in a local web page using Leaflet and GeoTIFF.js. I've followed the steps provided in various tutorials, but I keep getting an error ...
0
votes
1
answer
191
views
Discrete color ramp for GeoTIFF in OpenLayers
How can the following continuous color ramp be converted to a discrete one assuming, let's say, 5 more levels with random colors?
color: [
'case',
['>', ['band', 2], 0],
[
'...
- 9,255
0
votes
1
answer
301
views
Transparent background for Openlayers single-band, overviews GeoTIFF
I have the following GeoTIFF layer:
new WebGLTileLayer({
title: 'mb',
style: slope,
source: new GeoTIFF({
normalize: false,
sources: [{
url: 'raster/mb_p_sl.tif',
overviews: [...
- 9,255
0
votes
1
answer
142
views
Creating polygon based on depth data extracted from TIFF file
I am trying to extract and create polygons out of depth data from a TIFF file. I have a TIFF file of the depth model of Denmark, and I wish to create polygons that would resemble where sailing would ...
0
votes
0
answers
229
views
Can I use GDAL Translate to define 4 corners without reprojecting the image?
I would like to define four corners for an image without resampling or reprojecting the image. I can define two corners just fine with GDAL Translate, like this:
gdal_translate -of GTiff -a_srs EPSG:...
- 1
1
vote
1
answer
483
views
Read pixel values from GeoTIFF in C#
I am trying to read the pixel values from a GeoTiff in C#.
The pixels represent elevation data.
The GeoTiff is:
greyscaled
contains float32 values
non-tiled.
In Python this does exactly what i want:
...
- 43
1
vote
1
answer
246
views
How to save (as a PNG) single band thermal image geotiff raster with false color in rasterio
I am a newbie so please forgive my ignorance.
I have a GEOTIFF raster with one band (it's a thermal image of Chicago).
Here's the metadata:
driver: GTiff
dtype: uint8
nodata: None
width: 7921
height: ...
- 13
0
votes
0
answers
233
views
Converting .tiff image from Google Earth Engine to PNG format
I have exported the image from Google Earth Engine and trying to visualize it but It is showing black/Nothing. How to visualize the downloaded .tiff image in valid format [PNG] which can be seen in ...
- 79
0
votes
1
answer
505
views
How read GeoTiff NODATA value without GDAL in C#?
In C# I am writing a GeoTiff reader/writer that does not use GDAL. Not using GDAL is a requirement. I am able to read some things like the number of columns with code like:
using BitMiracle.LibTiff....
- 2,113
1
vote
0
answers
439
views
Geotiff image overlay mismatch with Folium map
I try to overlay a Gtiff image (data.tif) on a Map using Folium. The result is almost correct but there is a slight offset in the inner pixels (see Folium map).
When I display the Gtiff image in QGIS ...
- 11
0
votes
0
answers
126
views
How to export a list files (.tiff) from HDF format (MODIS product) using gdal.Warp in python?
I have a list of HDF files from MODIS product (see in attached). I want import them in python using GDAL library. Show my steps and explanation in the code below :
1. Import required libraries :
...
- 167
0
votes
1
answer
134
views
COG in ImageMosaic with data containing custom dimension
I have to work with data that contains, among others, a custom dimension (i.e., "pressure level"). Specifically, I have a dataset defined on lat, lon, time and plev dimensions.
The native ...
- 1
0
votes
1
answer
146
views
How to find how many times each pixel is covered in several GeoTIFFs?
I have a few GeoTIFFs which might have overlap, I want to find how many times each pixel is covered in several GeoTIFFs. I thought it is best to create a heat map in Python (using Gdal or Rasterio) ...
- 11