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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SAGA RESAMPLING SYNTAX

How can I solve the problem shown below: I am trying to build a plugin that allows me to resample the raster data to any desired resolution of my choice with 20 being the minimum input value, as ...
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Resampling for cellsize when exporting raster to GeoTIFF - GM

I used Global Mapper v20.0 for exporting the raster image GeoTIFF (32bit, from cellsize x= 0.008333333333000000898 arcdegree, y= 0.008333333332999999163 arcdegree) to cellsize x= 0....
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27 views

Equalize number of columns and rows number with different raster data which was taken from different sources

I am interested in creating a flood map using machine learning methods. I need the same number of columns and rows for each raster data or layer. However, although I used the same boundaries for ...
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r.walk issues in GRASS

I have been doing the r.walk analysis but fail to generate the result. The movement direction map and walking cost map from stop points is extremely small, limited to a 3x3 or 5x5 square. Does anyone ...
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What cell size do I use when the raster cell size is larger than the zonal vector features for Zonal statistics as table tool?

I want to calculate the mean precipitation from a PRISM raster for a land use data layer using the Zonal statistics as table tool for ArcGIS 10.7. The land use vector layer contains over 20,000 ...
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48 views

ArcGIS Polygon to Raster cell size issue

I am trying to convert a polygon to raster and I noticed that the cell size of the resulting raster appears different for different coordinate systems, despite me setting the cell size the same. Both ...
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23 views

Viewshed: why does a larger input cell size result in a larger viewshed area?

At Arc Desktop 10.7.1 I am conducting a viewshed analysis using the Viewshed tool. I am trying to understand how the input raster cell size affects the area covered by the output viewshed raster. ...
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Raster pixel size in QGIS automatically defaults to square

I am using QGIS 3.4 and my data consists of rasters with irregular cell sizes. In ArcGIS Pro, the cell sizes are maintained (screenshot below). However, when I upload the same raster into QGIS, ...
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Non-square raster pixels created during TIN Interpolation?

I am trying to create a raster by using the TIN Interpolation tool in QGIS. I'm using a 3D polygon shapefile as input. I'm looking to create a raster of square pixels, although despite specifying a ...
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88 views

How to change raster cell size WITHOUT resampling? (ArcGIS Pro)

I have hundreds of rasters, all with different rectangular cell sizes. I need to convert the pixels to be square, since I will be using a variety of Spatial Analyst tools such as Raster Calculator. ...
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29 views

Specifying grid width and height dimensions with ArcMap custom toolbox parameter

I am using I am writing a script to create a tool (in ArcMap 10.7.1) that involves overlaying an agricultural field with a specific grid size. I need the grid to contain a custom width and height of ...
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331 views

Create a grid in R, change in cell size displaces position of grid

I'm writing R script which will allow users to overlay a grid on their data in a new projection with the option of defining the size of the grid cell. This seems to work fine, however, when I plot two ...
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127 views

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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238 views

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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62 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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95 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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2answers
263 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
542 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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70 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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395 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
135 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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72 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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106 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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1k 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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458 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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147 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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34 views

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 ...
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1k views

Cell Statistics calculation in QGIS

Cell Statistics in ArcGIS will calculate the mean (or statistic of choice) among multiple rasters on a cell-by-call basis. Can QGIS do this and, if so, how?