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 ...
Lina's user avatar
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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 ...
Lina's user avatar
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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 ...
Juan Luis Gómez González's user avatar
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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 ...
EmZ's user avatar
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55 views

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 ...
Hailey's user avatar
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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 ...
Stefan Huber's user avatar
1 vote
1 answer
48 views

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 ...
Greta Martin's user avatar
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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 ...
Vicki's user avatar
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2 votes
1 answer
221 views

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 ...
Madeline Cox's user avatar
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26 views

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 ...
Diego_12's user avatar
2 votes
2 answers
139 views

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'...
Hartje's user avatar
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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???
Walker's user avatar
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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 ...
vince's user avatar
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1 answer
101 views

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 ...
scader's user avatar
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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 ...
Mobina's user avatar
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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 ...
dargando's user avatar
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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 ...
fatemeh pazoki's user avatar
1 vote
1 answer
42 views

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/...
Sulz's user avatar
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1 vote
1 answer
113 views

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 ...
Mohammad Reza Shirzad's user avatar
1 vote
1 answer
87 views

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 ...
shravani banerjee's user avatar
1 vote
0 answers
29 views

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 ...
winwaed's user avatar
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1 vote
1 answer
587 views

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 ...
Gijs van den Dool's user avatar
2 votes
0 answers
63 views

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 ...
Sean Jarrett's user avatar
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1 answer
226 views

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 ?
Leki Tshering's user avatar
1 vote
1 answer
72 views

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 ...
ReutKeller's user avatar
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1 vote
1 answer
124 views

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" ...
Giene's user avatar
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1 vote
1 answer
116 views

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/ > ...
LT17's user avatar
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0 answers
46 views

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 ...
Orla Osborne's user avatar
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51 views

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 ...
N_LLC's user avatar
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3 votes
1 answer
268 views

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 = ...
weltraumkojote's user avatar
1 vote
1 answer
124 views

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 ...
Zak H.'s user avatar
  • 11
0 votes
1 answer
80 views

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 ...
Chris's user avatar
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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 ...
D3usM4tos's user avatar
1 vote
0 answers
66 views

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 ...
Kajo's user avatar
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1 vote
1 answer
835 views

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 ...
Holt Dwyer's user avatar
1 vote
0 answers
313 views

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 ...
user212324's user avatar
0 votes
0 answers
47 views

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 ...
Babatunde Clement's user avatar
0 votes
1 answer
504 views

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, ...
Jessica's user avatar
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0 votes
1 answer
154 views

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 ...
Hrushi's user avatar
  • 169
-1 votes
1 answer
106 views

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 ...
Kaushik Vezzu's user avatar
1 vote
0 answers
47 views

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....
AhmedTech's user avatar
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0 answers
107 views

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 ...
AhmedTech's user avatar
0 votes
0 answers
235 views

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 ...
Rachel's user avatar
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1 vote
0 answers
148 views

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 ...
nd091680's user avatar
  • 113
4 votes
1 answer
2k views

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/...
hmnoidk's user avatar
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1 vote
1 answer
122 views

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 ...
PolyGeo's user avatar
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2 votes
1 answer
67 views

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 ...
Philipp Mitterschiffthaler's user avatar
3 votes
2 answers
4k views

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) ...
Łukasz Stempek's user avatar
0 votes
1 answer
53 views

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 ...
Oskar's user avatar
  • 11
1 vote
0 answers
446 views

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 ...
nn90's user avatar
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