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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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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Spatial resolution of Google Earth Imagery
What is the spatial resolution of imagery used in Google Earth? At various places on the web, I have been reading it varies from place to place - 60 cm, 2.5 m, 15 m and so on. I was wondering if there ...
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Raster export resolution using ArcMap
I'm trying to export a portion of Natural Earth's world 10M hillshade in ArcMap but above a certain latitude, the resolution unexpectedly changes and is really poor.
This is a screenshot of the area ...
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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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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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LAS Dataset to Raster tool not allowing resolution of window size in Triangulation interpolation to be manually chosen using ArcGIS Pro
I'm working on a workflow to convert a LAS file into a raster to calculate a bare earth model for drone surveys (~300m x 300m with a point density of ~1.5pt/cm^2) using the LAS Dataset to Raster tool.
...
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Improve resolution of WMS in QGIS
Does anybody know how the resolution of wms/xyz-tiles like Google Earth can be improved? In comparison to the original services at the respective Google websites the resolution at higher zoom level is ...
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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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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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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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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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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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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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Aligning two rasters of same resolution perfectly on top of each other in QGIS
I have two rasters, that I managed to make in the same resolution using the 'Raster tools --> Resampling' tool by SAGA. The pixel sizes are exactly the same, however the new resampled raster, in ...
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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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Kernel density estimation for frequency data on polygon level
I would like to make kernel density estimations for a variety of influencing factors on crime, but I do only have frequency data on polygon level, e.g. number of drug markets on county level.
For all ...
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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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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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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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Clip to mask layer not adhering to expected width and height following CRM and resolution changes
I am attempting to take a simple opentopo heightmap and carry out the following in QGIS 3.4.1
- Reproject to UTM 31N
- Set cell size resolution to 5mtr
- Clip to a shapefile polygon feature exactly ...
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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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What is the difference between Ground Sampling Distance (GSD) and spatial resolution?
In research papers on remote sensing, I see some authors referring to spatial resolution (expressed as pixel/distance) and others to Ground Sampling Distance (GSD) (also expressed as pixel/distance). ...
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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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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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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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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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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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Why ee.Reducer.sum() and ee.Reducer.mean() get the same value when used in reduceResolution()
I'd like to reduce Landsat image resolution to MODIS. But when I use sum () and mean() reducer, the results are the same. Then I tried using Minmax, mode reducer, surprisingly, they all are the same. ...
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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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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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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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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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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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Resampling to highest or lowest resolution when dealing with rasters of varying resolutions
I'm looking for recommendations on best practices for dealing with raster data layers with different resolutions and projections. The advice I've been given is to always resample to the layer with the ...
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Rescaling Sentinel2 data to 8 bit using GRASS GIS
I need to rescale Sentinel2 data (both lvl 1C and 2A) to 8 bit, because of the requirements of a GRASS GIS module (i.histo.match) that only works with values from 0:255. All the documentation of ...
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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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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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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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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 ...
