Linked Questions

3
votes
1answer
8k views

QGIS, Euclidean distance analysis [duplicate]

i wanna generate euclodian distance map for my road data. I 'll use it for multi criteria analysis. I can get it by using Arcgis Euclodian Distance tool but i wanna generate it in QGIS environment. I ...
10
votes
2answers
9k views

Cost Distance Analyst In QGIS?

Are there any tools, plugins or methods in QGIS which allows for an analysis of the best path between two points using least cost path method? As shown below ArcGIS has several distance tools.
10
votes
3answers
358 views

Calculating semi-major and semi-minor axis length of an ellipse in QGIS

I have a layer that contains ellipse-shaped geometries. The layer has projected CRS and there are also rotated ellipses in the layer. I couldn't find a tool or plugin related to semi-major and semi-...
3
votes
2answers
2k views

Problem with Distance Matrix in Qgis 2.83

I want to calculate the distance of archaeological sites to the nearest river. Following this question Calculating minimum distance between points and polygons in QGIS? I extracted the nodes of the ...
2
votes
0answers
5k views

How to obtain an euclidean distance raster from a vector file in QGIS?

I'm trying to obtain a raster of Euclidean Distances from a vector layer I have of a river in Spain. I did it very easily with ArcMap using Euclidean Distance, but I don't know how to do it in QGIS. ...
5
votes
1answer
1k views

How can I create a pollutant dispersion raster in QGIS?

As my previous questions have indicated, I am working on an air quality problem where I have a dataset of industrial emissions that consists of a location (long, lat), and an annual volume of ...
5
votes
1answer
1k views

How to find a single point furthest from any road?

I have a road layer of a country. What method or plugin would you suggest, to find a single point furthest from any road (but as you can see, there is a coastline, so points in the sea can't count) ...
1
vote
1answer
1k views

Calculating Distance from Vector Point to Raster Points

I am using QGIS 2.18.2. I would like to calculate the Euclidean distance from the pixels in a raster to a single Shapefile GPS point. My raster is a Geotiff DEM with a pixel size of 3.856 meters by 3....
0
votes
1answer
347 views

Calculating the distance of each pixel in a raster from a point in PostGIS [closed]

I have a raster in PostGIS and a table of points. I want to calculate the distance of each pixel to each point. How can I do that? For example, if 9 pixels and 3 points, then I want to calculate 27 ...
1
vote
2answers
321 views

Finding points within various radius's of another point

I am trying to find the number of crash accidents locations that lies within the radius's 0m-100m, 100m-200m, and 300m-400m of each red light camera location. However, I am not sure how I can do this. ...
2
votes
0answers
342 views

Creating raster layers, weighting them, and combining them in QGIS [closed]

I'm looking to create raster layers from vector layers, rescale them, weight them then finally combine them for a final result. I'm really not sure about the process to do this. On Arcmap it's ...
2
votes
0answers
313 views

Converting single point layer to buffered raster using QGIS?

I'm trying to use the proximity tool to create a distance raster from a single vector point. I found here: Calculating distance to points in QGIS and [d-3] Create Proximity Raster. However, I couldn't ...
1
vote
0answers
85 views

Creating raster displaying graduated Distance to polygon or feature using QGIS

I am trying to create a raster which displays the relative distance of a pixel to a set of polygons of a specific value. I have satellite derived fire scar data going back for the last 20 years. For ...
1
vote
1answer
27 views

rasterize vector creates raster with all cells containing the same value but different color

I have a vector layer which i am trying to rasterize. It is smaller than the study area. the end goal is to create a layer with euclidean distance from said rasterized vector layer. When rasterizing, ...
1
vote
0answers
17 views

Obtain distance of each raster pixels from anoth feature/ proximity tool failing

I have a raster with population densities for Vietnam. Each pixel contains 1 population count. For the purpose of my analysis, I'd like to find the distance of each of the pixels to a line feature, ...