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Questions tagged [weighted-overlay]

An analysis that examines different attributes of an area and creates a suitability score based on the sum of those ranked attribute values.

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23 views

Creating weighted sum analysis using DEM and population data using QGIS?

I have a shapefile containing population points for Vietnam, and I am aiming to perform a weighted sum analysis using a Digital Elevation Model. Basically, I'd like to combine elevation, population ...
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0answers
12 views

Using weighted overlay (horizontal banding) in ArcGIS Desktop?

I'm having a strange issue with the raster output from my weighted overlay. I have 7 layers in total, in either TIFF or GRID format. Each layer is in the same projection, has the same cell ...
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19 views

How calculates weights for Weighted Linear Combination

I am using ArcGIS 10.1, I would like to use the weighted linear combination for generating a suitability raster. I understood that firstly I have to reclassify the raster involved (in my case: slope, ...
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2answers
211 views

Weighted sum vs Weighted overlay

I´m working on a suitability analysis for which I´m doing a sensitivity analysis. When I modify the weights for this analysis I have values with decimals, so I can´t use "weighted overlay" tool. ...
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1answer
158 views

Ordered weighted averaging error: can only concatenate list (not “str”) to list

I am trying to perform an ordered weighted average on two rasters in QGIS 3.0.3 (as a trial run for doing it on more than two rasters). But I keep receiving the following error code: Traceback (most ...
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1answer
199 views

Ordered Weighted Averaging problem

I want to do an Ordered Weighted Averaging (OWA) analysis using SAGA in QGIS (not by using pyqgis) as a suitability assessment for recreation/restoration of specific habitats. There's a number of ...
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53 views

Issue with Weighted Raster Overlay Service for Suitability Modeler Widget

I'm attempting to build a hosted Weighted Raster Overlay Service (WRO) in ArcGISPro to use in AWAB's Suitability Modeler Widget. I've downloaded the Weighted Raster Overlay Service toolbox via THIS ...
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1answer
216 views

Performing Sensitivity Analysis on Suitability Model using ArcGIS ModelBuilder?

I am working on a suitability analysis model for a landfill site selection. Basically, I am using GIS-based MCDA so I have 11 factor layers/maps that I considered for the analysis. I have already ...
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1answer
494 views

Weighted-overlay on raster calculator?

I have got two cost surface rasters, one for land-use and the other for slope values. For my analysis, I've been told to make a "weighted-overlay", however I don't have the SAGA plugin available on my ...
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0answers
68 views

Weighted Overlay Missing Values

I am trying to create a bikeability index for some local roads. I have four inputs: traffic volume, speed limit, shoulder width, and slope. Each raster input has been re-classed to 6 classes. When I ...
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0answers
59 views

Adding raster layer in GeoServer using ArcPy gives exit code -1073741819 (0xC0000005)? [closed]

I am trying to perform a weighted overlay analysis using ArcPy. As input I'm using 5 map layers of same column and heights. def weightOverlay(): ambu = "rasterambu1.tif" fire = "rasterfire1.tif" ...
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1answer
196 views

postgis add vector tables together to create one weighted table

There are 7 polygon tables in postgis. Each table has a unique column that holds a weight of 1. so each row has a 1 in it. Without converting to raster I want to "add" up all the vector tables into ...
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1answer
727 views

Continuous smoothing of raster using R?

I have a dataset on some villages like this on a grid: I want to fill the space of the whole grid so that each grid cell has a value that reflects the pressure from the surrounding villages (i.e., ...
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1answer
1k views

Calculating area weighted average in ArcGIS Desktop?

I want to calculate area weighted average of districts of India. I have Particulate matter 2.5(PM2.5) data for Districts of India, and now I want to find area weighted average of PM2.5 for each of ...
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1answer
42 views

Combining rasters after weighted overlay

I have performed five weighted overlay analyses in arcgis 10.2 and got five rasters with pixel values ranging from 1 to 10 as outputs. Now I need to combine those rasters in one single raster stating ...
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2answers
106 views

weighted sum overlay of raster layers (Wind resource map and GHI Map)

I want to generate an output raster map which indicates the areas of wind and solar energy potentials. My study area is India. I have created GHI (Global Horizontal Irradiance) raster map (by ...
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0answers
276 views

Extracting a time interval from NetCDF-data in ArcMap Desktop 10.4

In ArcMap 10.4 (advanced licence) I have added a netcdf-file with EU-temperature-over-time data (time being every day between 1995 to 2016). I just need the year 2010 from this data, but I'm still ...
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1answer
188 views

weighted overlay of several rasters

I am trying to create a script that creates a new list of rasters by searching through the file names then using that new list to execute the weighted sum function in spatial analyst. I am having ...
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0answers
60 views

Adding Raster to Weighted Overlay causes large parts of Output Raster to have NoData pixel values?

I've been building a large suitability analysis model in ModelBuilder over the past couple of months, it has a total of 11 rasters created and put into a weighted overlay. The model runs and an ...
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1answer
157 views

Weighted overlay output raster does not match the extent of my input rasters

I am having trouble understanding why the resulting extent of my raster produced by my weighted overlay doesn't not cover the extent of the inputs I used. All my inputs are in the same coordinate ...
3
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1answer
401 views

Randomly generate points using weights from raster

I need to randomly generate ~ 40K points throughout my region of interest, but I need to weight the point selection by a set of probability weights, stored as a raster - such that higher probability ...
2
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1answer
152 views

Doing weighted overlay analysis using CSV data joined with shapefile in QGIS?

I have a CSV file which has data for different counties income, Population and Proximity of United States of America like this : ]1 I have already joined the CSV file with the shapefile of United ...
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1answer
203 views

How to use different columns of a csv file data as different layers for weighted overlay analysis in QGIS?

I have a CSV file like this: I would like to do a weight overlay analysis for each column of the CSV and present it as a layer of the map of United States of America. The final result should ...
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0answers
125 views

How to save raster output in different directory without duplicate in set workspace? Arcpy

I am using the Weighted Overlay tool in Arcpy and I've not had this issue before with other tools. I'm wondering if it's a tool-specific problem. The output I get from the weighted overlay tool saves ...
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1answer
717 views

Weighting amount of overlapping polygons in postgis

I have two tables that I join in my existing workflow. One of these includes flood events (was a shapefile that has been imported to PostgreSQL), the other one is a grid that holds the amount of ...
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1answer
53 views

How to weigh the size of a spatial event with respect to the number of its hotspots?

This is probably a map algebra problem. I have a 2D map with values ranging 0.0 to 1.0 spread all over it. The algorithm that produces them is an application of the fractional Brownian motion. The map ...
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1answer
265 views

Performing weighted overlay analysis in MapInfo?

I want to prepare a landslide zone map using weighted overlay analysis. Is there a tool in MapInfo to do weighted overlay as in ArcGIS?