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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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2 votes
1 answer
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Least average cost path (distance-agnostic)

I am wondering if there is a straightforward way in ArcGIS Pro to identify the path between two points of least average cost (as opposed to a least cumulative cost). Basically, I want a LCP that is ...
Daniel Hansen's user avatar
4 votes
2 answers
66 views

Change Value of Cell in Cost Layer (Raster) by whether it touches neighbouring cell

QGIS 3.36-Maidenhead: I have compiled a very large cost raster covering parts of Africa. I have applied cost values to all cells based on geographical considerations. I'd like to carry out a final ...
IanGS's user avatar
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0 answers
30 views

Excluding data from DTM using ArcMap

I am using ArcGIS 10.8.2 and I would like to estimate the least cost path between points. I am using a DTM with two lakes and I would exclude these from the least cost path estimation. I made some ...
Roberto's user avatar
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1 answer
40 views

Exclude data from DTM

I am using ArcGIS 10.8.2 and I would like to estimate the least cost path between points. I am using a DTM with two lakes and I would exclude these from the least cost path estimation. I made some ...
Roberto's user avatar
  • 71
0 votes
0 answers
24 views

Tobler's function in QGIS

I would like to estimate the least cost path between a source point to a group of other points. I would consider the cost as travel time by using Tobler's function in QGIS (I am new with it). What are ...
Roberto's user avatar
  • 71
1 vote
0 answers
17 views

Using two network / roads vector layers to calculate paths / routes

I'm working on a new problem that is complex to me, although I'd not be surprise to discover that there is already a solution to it in qgis. Here's an illustration of my problem : I have two roads ...
Vincent Monteil's user avatar
0 votes
1 answer
85 views

Least cost path based on flow direction

I need to find least cost path between two points inside a river polygon. The least cost path criteria is water flow direction, I need to follow the water flow to waste as little energy as possible. I ...
redhat's user avatar
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0 votes
0 answers
37 views

Adding conduits and barriers to friction surface in QGIS

I am in the starting process of A LCP archaeological project and am still new to QGIS and I've hit a issue. I am adapting the methodology of this: and have almost immediately hit a barrier. I am ...
Eath2468's user avatar
0 votes
0 answers
56 views

Least cost path_routing

I am using the Least-Cost-Path plugin tool to generate least cost routes using a given road raster layer...The thing is that the routes sometimes are irrational. For example, making a u-turn just ...
Alaa Torkey's user avatar
0 votes
0 answers
66 views

QGIS Least Cost Path Analysis taking forever

I have been trying to calculate the Least Cost Path (LCP) between two points on my map. These points are approximately 100km apart. I have created a slope from my DEM raster, created proper vector ...
Brittany's user avatar
3 votes
0 answers
109 views

How do I do a least cost path between polygons and not points in QGIS? For conservation corridors

I can create a least cost path (LCP) using a shapefile of points over a "cost surface" raster - But can I do polygons and not points? This is not the same as the LCP between the closest ...
nittyjee's user avatar
  • 465
5 votes
1 answer
256 views

Least cost path: what does least cost value represent, based on slope raster layer

Context and question I have a raster layer with slopes in percent and used the least cost path plugin in QGIS to calculate the least cost path from start to end. I try now to understand what the ...
Babel's user avatar
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0 votes
0 answers
22 views

Incorporate ocean crossing cost to mobility model in ArcGIS Pro

When making a cost distance map in ArcGIS Pro, how does one make the value of oceans high, and as a result harder to cross than the land? I am making a map of movement from sites in Europe such as ...
Felix Currell's user avatar
1 vote
0 answers
35 views

Perform cost distance with horizontal factors of varying magnitude

I am using ArcGIS Pro, I want to create a path-distance map for movement through water, factoring in ocean current direction and also magnitude. I have raster layers with the ocean currents in each ...
Kiran Hazra's user avatar
1 vote
1 answer
160 views

Incomplete set of least cost paths in R

In R, generate a conductance raster with "square" cells, derive the centroid of each cell, and compute the least cost paths (LCPs) between each pair of centroids through any of the possible ...
Laura Roich's user avatar
1 vote
0 answers
65 views

Population density grid confusion

I have a multi polygons data where red means most populated and white means less populated. I created a gridded population density (image on the right) out of them, but the result seems not quite make ...
Jack Zaki Zakiul Fahmi Jailani's user avatar
1 vote
0 answers
228 views

QGIS Least Cost Paths with multiple start and end points

I have a raster of UK rivers and I have a points layer of various spots within that raster. I was to compute least cost paths between each point. I've tried the Least-Cost Path plugin, but it is ...
Melanie Baker's user avatar
1 vote
0 answers
36 views

How to model the fastest gain of contiguous area above a certain value? [closed]

Imagine you have a grid of squares with values 1 to 10. Some squares are "available", and some are "unavailable", and must be "gained". Each step you can only gain ...
nittyjee's user avatar
  • 465
1 vote
0 answers
142 views

how could I calculate the shortest distance between points showing the distance in each different route?

I want to do a network analysis using any plugin, but the main problem is that I want to get the shortest distance between two points, but it must give me the distance in each route (in my case they ...
Joel Damian's user avatar
0 votes
1 answer
160 views

QGIS: Optimal path over sea

I am working on a project where I want to predict the historical shipping routes, i.e. optimal path from a coastal point A to coastal point B via sea. I know for optimal path via land, we could take ...
Sherry's user avatar
  • 49
0 votes
1 answer
50 views

Closest path between turbines to existing paths

I need to create the access road from the existing path to the turbines installed. We already have a layer with the existing path. I want to find the closest path through this existing path. Also I ...
Isabel Garcia's user avatar
1 vote
1 answer
210 views

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 ...
NewAtGis's user avatar
  • 1,536
1 vote
0 answers
49 views

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&...
Pierre's user avatar
  • 11
0 votes
0 answers
112 views

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 ...
Jaskaran Singh Puri's user avatar
1 vote
0 answers
30 views

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 ...
Nathan BeDell's user avatar
1 vote
0 answers
139 views

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/...
zansan's user avatar
  • 11
1 vote
1 answer
975 views

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 ...
NewAtGis's user avatar
  • 1,536
2 votes
1 answer
164 views

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 ...
Will Hipson's user avatar
0 votes
0 answers
76 views

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 ...
Flynx's user avatar
  • 115
0 votes
0 answers
46 views

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 ...
Saelon's user avatar
  • 65
0 votes
1 answer
103 views

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 ...
Flynx's user avatar
  • 115
3 votes
1 answer
255 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 ...
Nic Stray's user avatar
1 vote
0 answers
91 views

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 ...
abinalolita's user avatar
1 vote
0 answers
49 views

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 ...
bellbyrne's user avatar
1 vote
0 answers
124 views

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 ...
Pascal's user avatar
  • 36
2 votes
0 answers
83 views

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 ...
OrCe's user avatar
  • 29
1 vote
0 answers
74 views

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 ...
YamCham's user avatar
  • 123
3 votes
1 answer
1k 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 ...
madcat09's user avatar
0 votes
0 answers
100 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 ...
Craig Westell's user avatar
1 vote
0 answers
106 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 ...
Souf El Gnifri's user avatar
0 votes
0 answers
127 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 ...
Zac's user avatar
  • 23
6 votes
0 answers
111 views

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 ...
Heather Forbes's user avatar
1 vote
1 answer
130 views

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 ...
user131981's user avatar
-1 votes
2 answers
40 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,...
Sina_Alef's user avatar
1 vote
1 answer
715 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() ...
Sebastian's user avatar
2 votes
1 answer
162 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 ...
Roger's user avatar
  • 41
1 vote
0 answers
115 views

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" ...
Sina_Alef's user avatar
2 votes
1 answer
79 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 ...
Steffan's user avatar
  • 518
2 votes
0 answers
46 views

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°...
Phil Popple's user avatar
0 votes
1 answer
169 views

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 ...
YamCham's user avatar
  • 123

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