Questions tagged [cost-path]

A raster-based ArcGIS geoprocessing tool that calculates the least-cost path from a source to a destination over a cost surface.

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R - gdistance: setting to 0 the conductance values of cells corresponding to a polyline

Goal I aim at setting to 0 (i.e., not traversable) the cells of a transition matrix (storing conductance values) that correspond to a (poly)line. Where I am stuck I am having hard time to figure out ...
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Least Cost Grid to Connect a Start Point to End Points

I am looking for a method or plugin to find the least cost electrical grid to connect villages (end points) from a point on a existing grid (start point) in QGIS. I tried the "Least Cost Path&...
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How to Determine Least-Cost Path Corridors in QGIS?

I am predicting how moose will move with a proposed goldmine in an area. I am comparing baseline to post-construction conditions. I used the Least Cost Path function on QGIS, which kind of gives me ...
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Fixed distance path to maximise value of raster layer

I am working in ArcGIS, but I think this is a little more a conceptual problem. To summarise, I am trying to find a 10km path that both starts and ends on a road (roads are stored as a shapefile), and ...
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Path Distance Allocation tool in ArcGIS Pro, How to infer if source is a road network?

From what I understand, the tool, given a source like a point on map will give the least to highest cost to travel from that point throughout the raster. If my understanding is right, now If I give a ...
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QGIS Least Cost path build network model

I have in QGIS one point layer and one raster layer with least cost data. I want to create line network layer like Delaunay Triangulation does ... connecting point to network. But I want that this ...
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Has any research been done into navigability for offroad vehicles for different types of terrain and elevation changes? [closed]

"Navigability" is a pretty broad category, so to be specific, what I mean is, given some GIS data, how can we calculate the cost of moving from point A to point B, in some context? For ...
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Algorithm for least cost path used by SAGA

I have to calculate the least cost path between two points and found this tutorial: https://dges.carleton.ca/CUOSGwiki/index.php/Cost_Path_Analysis_of_Mars_using_SAGA. That's why I also want to use ...
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Least cost path algorithm in SAGA?

I'm very new to this topic. I have to calculate the least cost path between two points for a school project and found this tutorial: https://dges.carleton.ca/CUOSGwiki/index.php/...
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R (gdistance): least cost path passing through and/or crossing cells with NA

Intro The 'gdistance' R package is really useful in calculating least-cost paths (hereafter LCP) between locations. I have successful used some published material (LINK) for my purposes. What I'd like ...
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1 answer
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Least-cost path = great-circle path in open ocean? (R) (gdistance)

I'm using R and the gdistance package to generate the shortest routes in the ocean. In the open ocean with no obstacles, the least-cost path should equal the great-circle path. But I can't seem to get ...
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QGIS least cost path sum of several paths (robustness)

I use QGIS 3.16. For a wildlife conectivity model I used the plugin Least-Cost Path. For robustness of paths I used 3 different cost rasters for the same start and end points. I want to know which ...
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Accumulate values in raster cells with backlink connectivity

I have origin points in different regions and within these region also specific values within raster cells (with 50m resolution). My goal is to sum up the values of all previous cells in the ...
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Adding features from one raster to another using QGIS

I use QGIS 3.16 and dont handle Phython. Eventually I need to do a least cost path analyses (plug in) for migrating animal in a landscape. For the input cost layer I created a specific raster layer ...
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2 votes
1 answer
108 views

Merge overlapping polygons to elevation data

I'm new to GIS and need to create a shortest path avoiding buildings. The buildings are represented as polygons in a shapefile. In QGIS I created a buffer polygon for each building, corresponding the ...
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Compute least-cost matrix between all pairs of destination using GRASS v.net.allpairs (QGIS)

I have a vector line shapefile showing the road network in a particular country with data on the unit cost for each line. I also have a point shapefile showing the centroids of each district in the ...
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Service areas based on time to travel raster layer in ArcGIS

I have a series of raster layers which contain values for the time to travel (in minutes by motor) to a series of health facilities. I also have the GPS coordinates of each of the healthcare ...
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RAM overflow with new Distance tools: Optimal Path as Line

I have set up a workflow for least-cost path analysis using the legacy Distance tools of the Spatial Analyst. Trying to convert this into the new toolsets now, the new tool Distance Accumulation ...
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2 votes
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A QGIS tool to perform cost surface analysis (as in ArcMap Path Distance)? not a least cost path nor a network analysis? [duplicate]

Within QGIS I am trying to perform a surface analysis to show the part of the terrain that can be reached from one or more source points in let's say 1, 2 and 3 hours of walk on the ground. That is to ...
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Cost distance of one raster using routes of separate cost distance in ArcGIS Desktop

Is there a way, using ArcGIS Desktop, I can calculate the cost distance for one raster of cost values but instead of using the least cost distances from that raster, using the routes/paths determined ...
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2 votes
1 answer
434 views

Least Cost Path Error

I am working in QGIS and have been wanting to do a simple Least Cost Path Analysis using the SAGA tool. I have created a Slope raster for it, as well as an Accumulated Cost Surface. I have two points ...
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56 views

Least cost path

I'm assuming (perhaps wrongly) that the least cost path analysis in QGIS uses a number of steps out from the active cell in calculating the best route. If so, is there a way to increase the forward ...
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49 views

How to calculate a service area of a facility, while using multiple co-variables?

Problem we would like to solve is finding out what methods are to calculate the most efficient routes in a map with distance/travel time, pop density and facility capacity as co-variables! Perhaps ...
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52 views

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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QGIS plugins for creating circular route on footpath network

I'm looking for a way to create random circular walks of a specified distance from a given point. The end result will be similar to https://routeshuffle.com/ and http://www.routeloops.com/, but along ...
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1 answer
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Create polygon of fixed area based on cost/friction surface [closed]

I am using ArcGIS Desktop 10.4 and have all extensions. I have a shapefile of 494 points. I also have a cost surface/friction surface raster. I want to create a polygon of 13.4 hectares around each ...
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2 answers
33 views

Looking for land value data for anywhere in North America especially for Florida [closed]

I am researching on road alignment optimization. The research goal is to find least cost road alignment between two given points, considering highway codes. One of major costs which I need to consider,...
1 vote
1 answer
408 views

Transition Function Inputs

I would like to define my own gdistance::transition function. However, there are two issues that I aren't clear to me yet. First, I do not yet understand what the input vector to this transition() ...
2 votes
1 answer
74 views

Calculate traveltime from a Least-Cost Path route

I'm working in least-cost paths. I used r.walk to create cost maps. I used SAGA least-cost path routine to create routes from several points to the cost-map center. Now I need to calculate the travel ...
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1 vote
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How to iterate "Cost Path as Polyline" tool using ArcPy?

I have an optimization GIS problem to be solved. I want to use genetic algorithm to solve it in Python so I have to iterate my script many times. Recently i have realized that "Cost Path as Polyline" ...
2 votes
1 answer
59 views

Calculate cost of predefined path

I am trying to calculate the cost of walking a predefined path. The path can be a line or a number of points along that line. I have a DEM and derived it's slope, which I will use as a friction map. I ...
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QGIS Least cost additional constraints

I am looking to create a least cost path for a pipe line based on a landslide risk map. I was wondering if a least cost analysis has the possibility to put additional constraints on the pathing i.e 90°...
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1 answer
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Calculating true distance of cost distance raster using ArcMap

I have calculated cost distance using a raster unrelated to path distance (a heat index) but would like to also measure the true path distance of those 'routes.' Is there a way to calculate such? If I ...
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1 vote
1 answer
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sf polygon to raster workflow to calculate least cost distance with gdistance in R

I need to calclulate the shortest distance from a set of points to other sets of points in a marine area. Travelling on land must not be possible so I understand I need to calculate the least cost ...
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0 votes
1 answer
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Multiple least cost paths - automated labeling of the calculated paths with formula starting-point_destination-point?

I am using r.cost and r.drain to calculate a least cost path, using a single friction layer (slope), in a set of points, from each single point to the other. I would like to use the same approach on a ...
1 vote
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Reclassify slope raster

I want to reclassify a slope raster as part of Least Cost Path Analysis, but I'm a little bit confused about the reclass rules. My rules look like this at the moment (numbers left are degree): 0 ...
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202 views

Least cost path: single source point, multiple target points

I have a single source point in EPSG:3857, and a set of points, also in EPSG:3857. I calculated a slope layer from SRTM (in EPSG:3857) in the extent of the complete set of points. I would like to use ...
2 votes
1 answer
1k views

Least Cost Path Analysis in QGIS?

For my Bachelor's thesis I try to reconstruct a road betweeen two ancient cities. One method I'd like to try is least cost path analysis with QGIS. I've worked with QGIS before, but mostly only ...
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Average width of a a zone [duplicate]

How can I get the average width of a region or inside a curve? or How can I calculate minimum,maximum, and average width of an irregular polygon? I have attached a figure, I want to know how can I ...
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1 answer
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Which layer for least cost analysis?

I'm new to least cost analysis. I have a DEM-layer of a region and I want to know what's the least cost path from a to b. Do I have to use the DEM layer to calculate that? I also have a hillshade ...
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1 vote
1 answer
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Which layer for least cost path analysis

New QGIS user here, so maybe it's kind of a stupid question. I want to calcualte the least cost path between two points but I don't know which layer to use. I have two layers, one is a hillshade layer ...
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Least cost path creating unwanted straight lines

I’m very much a beginner with GIS and I’m stuck creating a least cost path. Basically, I’m trying to highlight which river valleys would most likely be flooded in the event of a volcanic eruption ...
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3 votes
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627 views

Cartographic Depth-To-Water method using Cost/Path Distance

I'm having trouble understanding the method for creating a cartographic depth to water index and seek some guidance. I'm using ArcGIS Pro 2.3, but equally happy with ArcMap desktop. The method is ...
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50 views

How to add additional weight to shortest path?

I am calculating shortest bath between two points. I need to add an additional feature eg. air toxicity in my calculation, so that the shortest path calculated takes into account the air toxicity and ...
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1 answer
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Merging layers in cost distance analysis to account for other variables?

For example, say I was rafting down a river but there was a small bridge in the way. That would significantly change the difficulty but not necessarily stop the progress. Is there a way for me to ...
0 votes
1 answer
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How to take number of states crossed into consideration while calculating the least cost path between two cities?

I want to create the least cost path between two cities. I have a cost raster that I can use to create a cost path between two cities. However, a new condition is that the path also should take into ...
2 votes
2 answers
502 views

Calculate cell distance between cells

I want to calculate the cell distances between all cells within a feature class grid. Exactly the same as the game Minesweeper. I have included an example below. The original data contains 11000 cells ...
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Cost distance tool to figure out shortest distance over water between 2 points

I have multiple points in a bay and I need to figure out the distance of each point to the nearest inlet, without going over land. I have been told to use the Cost Path or the Cost Distance tool but ...
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2 votes
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Least cost path from visibility

I use ArcGIS 10.1 and I am dealing with viewshed and least cost path analysis. I would like to generate a path on the basis of a cost surface taking into account the viewshed data as indicated in the ...
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Slope rasters - different results from different tools

I'm calculating Least Cost Path (LCP) within QGIS 2.18. The first step is to produce the slope raster from the DEM. Using r.slope in GRASS produces excellent results where I can go on and finally ...
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