Questions tagged [resolution]
Resolution is a measure of the smallest unit or sample in data that can be distinguished from any other, and/or the number of samples for a given unit.
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Determining resolution of specific image in PDF document
Can GDAL be used to determine the resolution of an image embedded inside a PDF? If not GDAL, is there another method?
I'm using gdal_translate to convert TIF+TFW files into geospatial PDF. I know ...
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Problem with font size depending on screen resolution - QT
I developed a QGIS plugin by designing the interface with QT Designer.
The inferface appears correctly on my computer (left image).
However, on some computers, I encounter size problems, especially ...
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How to make the display of a satellite image the same across users?
I have a group of users counting objects in a satellite image. To keep viewing conditions the same I wish each user to have the same display (e.g., the same scale).
To do this, I have asked users to ...
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Getting pixel size without opening raster using Python
I want to get the pixel size (resolution) of a raster without opening up the raster in gdal. I currently have my script opening the raster in GDAL using gdal.Open() and getting the resolution that way....
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Print City Map in High Resolution with TileMill (OSM Data)
I'm rather beginner in Print Map and GIS. I'd like to print the map of my little city using the data in OpenStreetMap. I've got an environment(local) with OSM DataBase and I'm using TileMill to ...
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QGIS3 - Maintain resolution of input rasters using raster calculator
In QGIS 3.28.4 after subtracting one raster layer from another using raster calculator, I notice that pixels in the results layer sometimes do not equal the difference between the input layers when ...
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Control resolution of Temporal Controller output
I put QGIS Zurich 3.18 .png files into movie software. (Pinnacle Studio 20). One .png file produced by Print Layout reads fine , other produced by Temporal Controller is illegible, too fuzzy. How do ...
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Single numbers for accuracy and resolution for vector and raster data?
This question is meant as a modelling question, not having to do with particular data formats. It was edited to better separate spatial accuracy and resolution (precision).
In order to make the ...
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What is spatial resolution of TROPOMI data in GEE?
In the description of TROPOMI NO2/HCHO data, the spatial resolution is 0.01 arc degree [see following(1)], however the Image Properties says the spatial resolution is 3.5×7.5 km² [see following(2)]. ...
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Merge raster tiles with different resolution and keep original resolution using Python
Problem
I have two raster images with different size and resolution, which are overlapping and which I'd like to merge. The smaller image has a higher resolution which I want to merge into the larger ...
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Resolution/displaying issue with legend item in QGIS
I'm having an issue in QGIS print composer. I am using QGIS 2.18.
Some of my legend items are displayed in low resolution or are partially cut off. The strange thing is that some groups of the legend ...
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Rasterio CLI warping multiple rasters like another raster in all minus one feature
I'm writing a bash script to warp all the rasters in a specific directory to match another raster. I'd like to warp all these rasters iteratively in to match the other raster in all was except shape ...
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Changing the spatial resolution - stacked raster in R
Want to change higher spatial resolution UAV dataset stacked in R. Used raster package to stack the individual band. Want to change the spatial resolution to 1 m.
stacked_UAV <- stack(stack_list)...
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High resolution geopdfs in Qgis 3
In Qgis 2 I used to get high resolution geopdfs form the Georefexport plugin. In Qgis 3 i can get geopdfs by using the print composer/layout. However, I can not find a way to get high resolution ...
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How to get extent from current resolution in OpenLayers 3 for printing
I need to print a map with a fixed scale of 1:500 horizontally on a A4 paper (297x210mm). The map is done with Openlayers, the print request is sent to QGIS server using WMS getPrint function.
Till ...
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Maintaining same extents in R?
How can I maintain perfectly equivalent raster and SpatialPointsDataFrame extents when in R?
Each time I combine rasters, or raster and point data, the extents are very slightly different (like ...
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Reprojection changes resolution QGIS
I have US National Atlas (EPSG:2163) file having resolution of 250 m, 250 m that I want to reproject to EPSG:4326 with the same pixel size as the original map. Using
gdalwarp -overwrite -s_srs EPSG:...
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Calculate Bounding Box from Center at scale
So I was trying to find my answer in Calculating bounding box by given center and scale in Android?
And below is what I've implemented (Ruby) with the size heigh/width in pixels being the same as a ...
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Losing resolution using gdalwarp to change projection?
I’m trying to project an image from Mars using gdalwarp, from eqc to polar stereo projection:
gdalwarp -overwrite
-s_srs "+proj=eqc +lat_ts=0 +lat_0=0 +lon_0=0 +x_0=0 +y_0=0 +a=3396190 +b=3376200 +...
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Meaning of Spatial resolution (m) = 2 rng?
I'm reading a catalog about SAR sensors.
On page 17, it is said that:
I've read the PolSAR data format for UAVSAR before, But not the other documentations related to InSAR, because I didn't ...
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Size of an object in raster image based on DPI resolution and number of pixels
I'm trying to estimate the size of an object in a raster image, with known DPI resolution.
To evaluate the validity of this method, I do as follows:
1) I'm drawing a 0,02 in × 0,02 in black square ...
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Geographic vs. projected raster cell size area
I am wondering the best way of knowing how to define the area of each raster cell in global data. Specifically, I downloaded all ~400 tiles of MODIS land cover data, mosaiced them into one, and now am ...
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DPI Dependent OSM Tile Rendering
We have built an OSM Tile Server following the instructions at
http://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/
The tile server is rendering tiles, but the street names on ...
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How to get bounds coords by center LatLng point, width and height in pixels and zoom?
I have to calculate bounds coordinates to query mongodb box on server side to get data before google maps is loaded.
How can I get four LatLng corners by center LatLng point, window width and height ...
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How can I improve the resolution of a vector grid made in north pole stereographic projection?
I've been struggling with this for a while and wondered if someone could lend a hand. I have a map which already has sampling points from centroids in a 35x35km grid that was created in north pole ...
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Anyone have success with OpenLayers and ArcGISCache?
OPENLAYERS
Has anyone had success using OpenLayers and the ArcGISCache layer beyond the examples? I'd like to mix tiles with different resolutions and although they seem to scale correctly they do ...
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Why does shapefile resolution change in ArcGIS Online?
When I work in ArcGIS Pro the shapefile visualizes correctly in the map.
However, when I upload the same shapefile as a compressed ZIP file to ArcGIS Online and then visualize it in Map Viever the ...
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Estimating resolution interpolated from point samples
I have a series of data samples (actually satellite measurements), and I am interpolating the data to produce a raster. I can interpolate to any arbitrary resolution I like; but how can I estimate the ...
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QGIS GUI layout and screen scaling in Windows
I am using the QGIS 3.30 GUI and the interface size doesn't seem to scale to my display/screen display and the bottom bar (where you have a box to display the map scale) is misaligned.
Is there a ...
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Warp Natural Earth raster without losing resolution
I'm trying to make a world map using Pseudo-Mercator projection (3857) and Natural Earth's 1:10m raster in QGIS. However, Natural Earth apparently doesn't like Mercator, so it cuts the extent of the ...
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Scale and data precision
In the metadata of a database containing locations of natural hazards, it appears that the accuracy of the georeferencing of each point is associated with a scale of 1:10,000.
How can I associate this ...
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Generating MBTiles from TIFF with the same quality in QGIS
I tried several methods with QGIS 3.28 to generate a .mbtiles from a georeferenced .tif, but other methods failed except the "Generate XYZ tiles (MBTiles)" tool but the output .mbtiles ...
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QGIS - Resolution issue
I have 2 images. One of them was using a custom CRS that had pixel of 463m. I used warp(reprojection) on this and used the epsg4326 CRS. This then converted the image from 463m pixel to 0.00205 pixels....
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Change the resolution of the friction surface raster and compute cumulative travel time in R
I have downloaded the 2015 friction surface from the Malaria Atlas project website (see bottom of the page). On their websites, authors specify that the measure units of such a raster are minutes to ...
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Resampling high resolution binary raster
I have a large, high resolution raster of binary data that I need to reproject and resample to align with a lower resolution dataset. Because the original data is binary, I need to aggregate using the ...
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SRTM resolution increase (~88m to 30m) causes a windowpane check pattern in subsequent hillshade, aspect, slope, etc
I'm working thru QGIS trainings and ran into this:
Task is to use both a low-res Rainfall SRTM (32733) and a higher-res DEM/SRTM (4326) to produce rainfall, slope, and aspect layers, combine them, ...
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How does Google Earth Engine deal with scaling up/down categorical data?
I read the docs on Resampling and Reducing Resolution and Projections. I sort of get that the scale/projection is determined by the final outcome but I still don't get how categorical data are handled....
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Deep machine learning to improve satellite spatial resolution
Are there currently technologies based on deep machine learning that can improve the spatial resolution of satellite images (e.g. Sentinel-2)?
An example of the use of such technology to reconstruct a ...
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How to convert MODIS 500m resolution to 0.05 degree resolution in Google Earth Engine?
I am checking MODIS GPP product in google earth engine and I noticed that the spatial resolution is not matched with our product. Our product is 0.05 degree resolution but, in case of the MODIS GPP (...
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Output resolution issue for r.forestfrag in GRASS
I've been trying to calculate forest fragmentation index for a 1kmx1km (30 arcsecs) raster using r.forestfrag in GRASS. I was expecting an output raster of the same resolution but the output I'm ...
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Decreasing resolution when exporting PDF with plugin in QGIS
I make a QGIS plugin to export PDF. However, the size of PDF is large and it takes a long time to open the file. Therefore, I want to export PDF with a small resolution.
How can I change the ...
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Georeferencer negative impact on image resolution
I added CRS to my .tif image(it weights 120gb and doesnt have CRS) using QGIS gdal method (Georeferencer). And the result .tif image with CRS (EPSG:4326) weights 70gb and image resolution is much ...
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How to compare Coronavirus deaths between countries
Leaving aside the problem of how deaths are counted (in some countries a doctor diagnoses the case, others insist on a positive test, some only count hospital deaths), how do we accurately compare ...
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Pixel Location of Sentinel 1 & Sentinel 2 and SRTM
I am processing integration S1, S2 and SRTM, since their pixel grid does not align with each other I am figuring out how to snap with them all into one grid. Before coming with specific reprojection ...
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Resample raster image, how to choose new resolution?
I know this is not a new question, and I know it depends on the context and what I would like to do with the data, but I am still finding it difficult to solve this problem in practice. And I haven't ...
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Print Openlayers WMS map with fixed scaling
I need to print a map with a fixed scale (1:500 and 1:1000) on A4. The online map is done with Openlayers, the print request is sent to QGIS Server using WMS getPrint function.
I mange to get an ...
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Setting both spatial extent and resolution when using gdalwarp?
I would like to overlay two tiff image that orginally have different projections. One is MODIS sinusoidal and the other one is WGS84. I use gdalwarp to re-project the latter into the same projection ...
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Increase the dimensions of each cell in a raster without any kind of resampling?
I have a DEM interpolated from a TLS point cloud at 1 mm cell resolution. This resolution is too fine for use in a 2D surface inundation model with the required timestep, without the model taking far ...
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leaflet 2 layers with different resolutions
EDIT : Wrong projection pastet into this post.
Im trying to add 2 layers to the same leaflet map that have different resolutions.
They got the same Projection and bounds but different resolution.
I ...
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Programmatically export OpenLayers map with maximum zoom/highest resolution
I have a problem to export a OpenLayers map to a png or jpeg file.
What I want is the full map and with maximum resolution, what I get is a part of the map with minimum resolution.
The map is hosted ...
