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ENVI band math incorrect values
I'm attempting to calculate vegetation indices in ENVI 5.2 using level-2 AVIRIS data in band math.The indices I'm working with are Vogelmann Red Edge 2, normalized difference red edge, and red edge...
View ArticleHow to select classes from a GeoTIFF world map and compute the area by...
I have two files:fileLUse.tif defines land cover classes in GeoTiff format (from https://www.esa-landcover-cci.org/?q=node/164)fileRegions.shp defines administrative borders and it is a shapefile (from...
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QGIS graphical modeler and raster calculator
I'm making a graphical modeler that creates me a kind of DSM, like that:I create a DEM for my extent (I have the DEM for my whole country).I have the Lidar for the height of the forest and I extract it...
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Using Raster Calculator Con(isnull) with ArcMap
I am using ArcMap 10.4.1 and the Raster Calculator to subtract polygons of clouds, land etc from my DEM. I use the statement:con(isnull, Cloud, DEM) and set the processing extent to environments of...
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Summation of rasters shrinks area of interest
I have a raster representing a street network, a raster with values on that street network (sum_raster), and a vector layer with a number of polygons. Those polygons get iterated over and rasterizet...
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Remove raster values above a numerical threshold
I have a set of interpolated raster files derived from a road network. Where QNEAT3 has interpolated between the road lines to make a simple outside edge, the values given in these 'white spaces' are...
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Calculating Population-Weighted Exposure level using QGIS
I am trying to calculate population-weighted exposure level (PWEL) of particulate matter. I have raster layer of both particulate matter and population. The equation to calculate PWEL is:Pi is...
View ArticleSetting specific pixel value to null in categorical raster
I have a raster where each pixel value indicates a crop type. For example, 10 is corn, 14 is barley, and 20 is blueberries, 26 is cranberry, and so on.I'm trying to convert this into a binary raster of...
View ArticleImportError when importing QgsRasterCalculator in QGIS
I'm running QGIS 3.28.8 on Windows 10, Python 3.9.5.In the Python interpreter when I runfrom qgis.core import QgsRasterCalculatorI receive the following error:ImportError: cannot import name...
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Error while using Raster Calculator to calculate NDVI in QGIS
I exported 2 raster bands of Sentinel II (band 4 and band 8) to calculate NDVI (B8-B4)/(B8+B4), these 2 rasters are in EPSG:32630 - WGS 84 / UTM zone 30N. I'm currently using QGIS 3.26.1.When I try to...
View ArticleTIN Interpolation (the result didn't show up in Map Canvas)
I am having trouble with TIN interpolation.Input Data:DTM topography of study areaMapped Points (with phone)LatitudeLongitudeElevationThickness (topsoil & rock)I would like to create TIN to present...
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Union three rasters using raster calculator of ArcGIS Pro
I want to combine 3 rasters (land use, water bodies and airports) into on raster with only two values 0 and 1 where the places of land use, wetlands and airports are = 0, otherwise = 1I used raster...
View ArticleTesting if two different rasters have overlapping data (not extents) before...
I am writing a toolbox script that will generate a difference surface using the raster calculator in ArcMap by subtracting a raster of interest from many other existing rasters, then outputting the...
View ArticleCreating land use layers
I have a land use layer which includes 36 different individual classes. Using the raster calculator I have been able to extract 1 of the different classes and make a new layer (landuse=[number of the...
View Article"TypeError: index 0 has type 'QgsRasterLayer' but 'QgsRasterCalculatorEntry'...
I start to write my own simple code to automatically calculate NDVI from Landsat 5.Here is my code:from PyQt5.QtGui import *from qgis.analysis import *land_3 =...
View ArticleQgis3 APIbreak : QgsFeedback instead QProgressDialog while using...
I upgraded my Qgis to 3.0.1 and I try to upgrade some of the plugins I wrote.I have a plugin which uses GDAL/rastercalculator from several raster layers to get new information.With Qgis2 api it was...
View Articlegdal_calc to replace null values of one raster with values of another not...
I have a raster containing NULL values in which I'd like filledTo do so, I have interpolated the raster via IDW in GDAL, and then used the QGIS raster calculator to perform the following...
View ArticleError 000539 in ArcGIS Desktop?
I am using Raster Calculator in ArcGIS 10.4.1 in order to substract two raster surfaces. However, when I substracted the two surfaces an error 000539 was appeared! I tried to adjust the two surfaces in...
View ArticleAdding a criteria to raster calculator that changes the output
I am doing a weighted site suitability analysis in raster calculator. Due to the weights assigned the site analysis shows certain areas that are certainly not suitability as having decent suitability....
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Convert written formulae into ArcGIS Pro Python or Raster Calculator Expression
D is my Distance Raster (Dras). it is made.I need help putting the formulae below into ArcGIS Pro Python or a raster calculator expression in ArcGIS Pro. It should only run on values where Dras <...
View ArticleQGIS raster truncated output or file corruption
I'm working with several large raster datasets that I want to use in the raster calculator:("Fusion_LCM_AGRO_raster@1" * 0.3) +("Streams_AGRO_raster@1" * 0.3) +("Raster_FloodRisk_AGRO@1" * 0.2)...
View ArticleSetting all pixels with value
I am using QGIS.I have a DEM raster with pixel values between about 3000 and -0.0003.I need to set all pixel with a value of 0 and smaler (<=0) to "nodata" (for later raster calculations and to...
View ArticleRaster Calculator in processing scripts crashes using PyQGIS
I am currently writing a processing script for QGIS that goes as follows:Takes in a digital elevation model (DEM) tiff file, a shapefile mask of the study area, and a slope cutoff value in percentClip...
View ArticleWhich output data type to choose in QGIS SAGA Raster Calculator in Batch Mode?
I have 5 years of MODIS13Q1 NDVI .tiff images for time series analysis. I want to multiply all the images with the scale factor of 0.0001 before using them. In order to process all at once I try to use...
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ArcGIS Raster Calculator Error 000539
I am getting the error-000539: Error running expression: rcexec(). I've seen that other people have this same issue but I am not sure how to fix mine. I just want to average the values of 10 rasters,...
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Problems in calculate mean band values inside polygon
My goal is: to calculate the minimum, maximum and average values of a raster band within a polygon feature, without using any library, only using PyQGIS: polygon_geom = polygon.geometry() extent =...
View ArticleSpecify field of raster in Raster Calculator expression of ArcMap
In Raster Calculator I need to apply the next expression:Con("raster1%","field3")==Integer, Lookup("%raster2%","field3"),Lookup("raster1%","field3"))or more...
View ArticleTypeError: unsupported operand type(s) for -: 'str' and 'int'
I have 732 temperature rasters (366 min and 366 max temp) that I want to manipulate depending on if the max temperature was greater than a specified and constant crop category temperature.import...
View ArticleConverting floating point raster to vector
I'm trying to convert a raster layer to vector but I'm really struggling.First it says that I have floating points rather than integers so I have I have seen you can use raster calculator to multiply...
View ArticleAssign a value to a cell based on the elevation difference with its...
QGIS newbie here. I have a DTM raster layer and a river raster layer that shows location of rivers. I would like to first check if cell X is a river. If yes, check if any of its 8 neighbouring cells is...
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