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Questions tagged [cell-size]

Cell size, also know as resolution, is the size of each individual cell, or square, on an image.

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Batch process aligning multiple rasters in QGIS

I would like to know if there´s a way to run a batch process that consists in aligning (changing cell size from 10 to 20 in Sentinel 2 imagery) in QGIS 3.4? I need to resample band #8 (resolution 10m)...
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Find closest points using S2, given point and radius

I'm trying to use the go s2 package to find closest points, given a point and a radius (meters). I'm modeling my alg. after dynamodb-geo.js as I'm storing my points in DyanmoDB. I can't seem to get ...
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33 views

Sum multiple rasters using raster calculator, the result raster had a larger cell size?

I have 365 rasters (daily) and therefore I summed them to form an annual raster using raster calculator in Arcgis. The original cell size of daily raster is 5*3.75 (col 72, row 48), while the cell ...
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1answer
85 views

Cell size issue with Landsat data

I have calculated a temperature map from Landsat Image. This map is correct but I the cells can be seen obviously. I have changed the cell size from 30m to match my other products which are 1m. I used ...
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1answer
56 views

Determine area of cell in raster (QGIS)

I have a raster layer of which I would need to find the area (m2) per cell. Any suggestions for a simple approach to achieve this?
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1answer
242 views

How big is a MODIS 250m pixel in reality?

How big is a MODIS 250m pixel in reality? This appears to be a question that contains its own answer, but I have several reasons to doubt that the pixel size is actually 250m x 250m: I downloaded ...
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1answer
58 views

Cell Size Discrepancy When Exporting TIFFs Using QGIS?

I am using QGIS Madeira 3.4.3. I am downsampling 100m TIFFs to 1000m. I am using Export - Save As GeoTIFF specifying cellsize 1000m, and the appropriate No Data value. This works just fine with the ...
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1answer
163 views

Extract Raster Information using Python

I would like to extract raster information (i.e. coordinate system, cell size) to excel file using python, how can I do that?
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1answer
102 views

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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1answer
47 views

Change cellsize of ArcInfo Grid ASCII data

I have a ArcInfo Grid ASCII file of Turkey with cellsize 0.000833333333 (3 arc second ~90m for equator and ~83m for Turkey, I've learned so far), Can I just simply change the header value to 83m or is ...
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s2geometry cell tiling function in Java

Is there any chance to find Java implementation for s2geometry tiling functionality? Are there any analogous libraries for tiling? What Im' trying to do: Split the world on cells up to level https:/...
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1answer
54 views

Converting proximity from PIXEL distance to GEOmetric distance in QGIS

I used the Raster>Analysis>"Proximity (Raster distance)" tool in QGIS in order to create a raster of distances to a particular value in another raster. This is the same sort of thing someone might do ...
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1answer
540 views

Changing cell size of raster in QGIS during extraction (clip)

I want to be able to tweak a raster to be exactly 1mtr cell size during export to bmp or tif. at the moment it's approx 1.19 In Global Mapper the process is clear - I would just simply change the '...
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1answer
334 views

Change pixel size of MODIS in GEE

I am trying to perform some scale-tests with some data on GEE. I have the following code where I use the MODIS-NDVI dataset at 500m. What I want to do, is to perform the same analysis but on 25000m x ...
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1answer
109 views

Is the cell size dependent on the number of features for the Euclidean Distance tool?

I have attempted to run the Euclidean Distance tool, using ArcMap 10.5.1, on a feature class of 50 points (hospitals), but I received an invisible output. Using 'Identify' I get 'NoData' for the pixel ...
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Extraction by mask using a polygon changes the cell counts on each category?

I am attempting to use Extraction by Mask on a raster set (land use) to gather the cell counts of each category. The data is from a county level and the polygon I am using is a specific city within ...