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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TIFF resolution decreases when opening it in the layout (QGIS)
I have a TIFF which I want to put in to the layout in order to add the legend etc. However, when I open it in the layout the resolution decreases significantly. I tried it with the TIFF as well as ...
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Image Resolution degrading when georeferencing
I have a scan of a historical map in pdf. I converted it in to png as well as tif and then georeferenced it. However, as soon as I load the image (both png and tif) in to the georeferencing tool the ...
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QGIS, Exporting .svg from a map, I can not produce it with as much resolution as in the main window
I am doing a PhD in wildfire modelling so that I need to deal with GIS data, mostly for visualizing purposes and data preprocessing.
I am connecting to a XYZ tiles to produce a satellite map. In ...
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What do the numbers on the scale mean when I zoom in and out
I am using a map that overlays carbon emissions over geographies produced by a satellite. When I zoom in and out, the number on the "scale" changes. I want to know what this number actually ...
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Export a high resolution image from ArcScene
My 2D output from ArcScene is very pixelated, regardless of the export format I use. I've tried higher DPI, but that doesn't seem to help. I've tried PDF, JPEG, SVG, TIFF, .ai. They're all very ...
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CesiumJS: bad imagery quality (resolution) in very close views
My TMS-Layer displayed in my Cesium-App is very unsharp rendered in a close view.
When I zoom out the resolution is perfect.
The resolution in the PNG tiles (Zoom-Level 21) is much higher than ...
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reduceResolution error code does not have a valid default projection
I am trying to get 100m resolution maps of NDVI where water is identified using the ESA landcover data set and masked. Both the NDVI and landcover data sets have a native resolution of 10m. however ...
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Export to image not showing fill map QGIS
When I go to export the map as an image, and then view the file it only displays a small portion of the map. I have been going into the printing business trying to get the resolution right and have ...
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Blurry resolution when uploading DEM 5ft data onto QGIS
I am creating a map for the nature preserve I work at. I have been downloading Kentucky elevation data from THIS website. You can see that there is a really high resolution, and I am able to see the ...
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Query: Raster alignment in QGIS (pixels without data)
I would like to know if when aligning rasters of different resolutions in QGIS if it is possible that some areas that do not have data can somehow be modified or interpreted to give an explanation ...
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QGIS how to change raster resolution
I'm currently working on comparing raster maps between years to detect landscape change between them. One issue is that at one point the resolution changed from 25x25 meters to 5x5 meters. I'm sure I'...
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Resampling Sentinel-2 images
I want to change Band-11 (SWIR Bands) of Sentinel-2 to 10m resolution. I found resampling process used for it. Doesn't it affect the spectral characteristics for processing further???
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In GEE: Calculating area in WGS84 masking out regions with layers in different resolutions
I am trying to calculate the number of affected people by flooding, but only those who are living in urban areas. So essentially, I take the WorldPop dataset and overlay it with flood extent and land ...
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Calculating resolutions for OpenLayers WMS layer missmatches GWC
I need to use 512 sized tiles to display radar tiles from the NWS GWC, but after following the examples from OpenLayers, the resolutions do not line-up and I get the following error when requesting ...
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To add locations' name on top of the NDVI map in Google Earth Engine
I have visualized an NDVI map on GEE and added my plant specimens locations on top of that using the "asset" tab.
Now, I need to choose different locations inside and outside the city based ...
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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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Download the data of a picture Sentinel-5P
I am researching about air pollution in Tehran. While I want to export data about parameters like NO2, SO2 or HCHO in Sentinel-5P, in Google Earth Engine, the data that export in CSV are different ...
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VIIRIS Nightlights resolution when merging raster files in R
I do download Nightlights data from NASA (login neccessary, I`ve got the one for Germany tiles h18h19 v03 v04, four files in total) :
https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/5000/...
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Spatial resolution of Sentinel 5P
In Google Earth Engine, Sentinel 5P, Sentinel-5P OFFL AER AI: Offline UV Aerosol Index page has written the resolution is 1113.2 meters. When I checked the image properties it is mentioned that the ...
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Exporting MERRA2 image with Google Earth Engine with same resolution
I am trying to extract MERRA2 columnar dust data from Google Earth Engine for a specific range of dates. I have to download it as daily data so I have converted it from hourly to daily. The image's ...
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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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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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Changing 10m to 20 m Resolution in QGIS
I have Esa world data of 2020 it is in 10m resolution and I want to change it to 20m resolution in qgis. How can I do it ?
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Artifacts in high res pan sharpened image after calculating NDVI
I have high resolution image that is pan-sharpened.
When I visualize the original image vs the pan-sharpened, it seems to be good:
However, when I calculate NDVI I get artifacts- there are different ...
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Resolution difference between Satellite image (Google or ESRI) and exported TIF
I'm trying to export a TIF image from a satellite image (from plugin "QuickMapServices").
I tried several ways like :
Saving raster layer as GeoTIFF (the simple option ("export" ...
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Miminum values of a raster change when applying r.resample
I am trying to aggregate a raster of a bioclimatic variable (can be downloaded here: https://envicloud.wsl.ch/#/?prefix=chelsa%2Fchelsa_V2%2FGLOBAL%2F > Climatologies > 1981-2010 > bio/ > ...
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How to extend raster edges when rescaled using the warp tool in QGIS
I am rescaling a raster from a resolution of 100m to 2000m using the warp tool (method cubic spline) in QGIS, it looses a lot of information around the edges which I would like to retain. Is there a a ...
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Downsample large raster without reprojecting first
How can I downsample a large TIFF (raster) which is projected in decimal degrees without first having to reproject it to meters. I know that in meters the resolution is 3cm and I want to downsample to ...
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Resolution unit calculation
I'm quite new in the field of GIS, currently working with QGIS.
I didn't find a simple overview of the connection/calculation of resolution units yet.
Is it like this (pixel size for QGIS)?
~ 1km = ...
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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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Different raster's resolution but same pixel number, how is it possible?
Bands 1-7 & 9 of Landsat 8 have a spatial resolution of 30 meters, but Band 10 and 11 have 100 meters. Bellow there are NDVI and Band 10 Rasters of a study area.
Does each pixel of the band 10 ...
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How to associate all NDVI values from csv export command with other raster application in other platform. I need to check with ndvi in python routine
I'm trying to understand how can I associate a NDVI values from EE csv exporting, importing these values in other software to check NDVI values resulting from equations. But I'm confusing how to ...
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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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Exporting high-resolution MODIS image from Google Earth Engine
I'm trying to extract from Google Earth Engine a large raster based on MODIS 250m data. However, when it gets sent to Google Drive, the resulting .tif has only a few pixels.
Here's my code for ...
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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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Landsat images not showing water bodies and it appears on Google Earth
I tried working with Landsat images on ArcMap 10.2 for Land Use/Land Cover changes to monitor change detection over 40 years using supervised classification. The land use is classified into four which ...
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Extract raster values to polygon
For my project I need to get a raster containing green leaf index (GLI) values of a whole region.
My first idea was to merge all raster tiles and then extract the data. Upon attempting this though, ...
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Google Earth Engine reproject method not giving desired resolution
I want to have raster with 30 m resolution. Using EE's reproject method:
lulc.reproject(crs='EPSG:4326', scale=30) (OR)
lulc.resample('bilinear').reproject(crs='EPSG:4326', scale=30)
Is giving raster ...
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Getting high resolution DEM for a location [closed]
As a part of my project, I want high resolution (10m approx) DEM for my desired location.
How and where can I get it?
I already tried with 30m DEM obtained from USGS.
I am getting blurry DEM, if I ...
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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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QGIS - How do I upscale resolution of raster data from 500mx500m to 100mx100m?
I have a raster file that is derived from MODIS which gives 500mx500m resolution and want to change the resolution to 100mx100m. The issue is when I look at the properties of the file it only gives ...
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Changing spatial resolution of raster layer using QGIS
I'm working with the Hansen forest loss year data from Global forest watch (which is 30m per pixel) as part of my MSc thesis to look at deforestation risk of palm oil. All I want to do is to change ...
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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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Specifying target resolution when resampling with rasterio
In GDAL warp you can simply set an xRes and yRes value. I'm trying to only use rasterio, but the process seems a lot less clear.
According to the docs https://rasterio.readthedocs.io/en/latest/topics/...
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Ensuring that polyline feature class and LRS Network have same XY Resolution using ArcPy, ArcGIS Pro and Location Referencing
As someone experienced in Dynamic Segmentation and Linear Referencing but new to Location Referencing within ArcGIS Roads and Highways I am struggling to use Create an LRS Network and its surrounding ...
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Calculate height profile from cogeoTiff using rasterio
I want to create a service calculating height profiles using our CoGeoTiff LaserScan data from Austria. It has a 1m resolution at its deepest level and is about 400GB big. Generating height profiles ...
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Generating high resolution MBTiles in QGIS
Is it option to generate MBTiles file in high resolution (512x512 / 192DPI) in QGIS?
Generate XYZ tiles (Directory) tool allows to create high resolution tiles, but in Generate XYZ tiles (MBTiles) ...
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Managing the drop of information when converting/downsampling from vector to raster (QGIS/GDAL)
I need to rasterize my vector (polygon) data to 10m resolution (to match Sentinel's 10m resolution). But as you can see in the picture, the results are bad for small structures like roads etc. Is ...
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QGIS is slow and vectors have low resolution [closed]
I have a new, alright laptop (16GB RAM, nVidia GeForce mx450, 3.3 GHz i7) and QGIS has worked very smoothly so far, even when working with massive files. But recently, quite suddenly, QGIS became much ...
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