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.
210
questions
0
votes
0
answers
40
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 ...
0
votes
0
answers
33
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 ...
- 1
3
votes
0
answers
62
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 ...
- 465
5
votes
1
answer
168
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 ...
- 67.2k
0
votes
0
answers
15
views
Establish a least-cost path between a point and a line (coastline)
I have a basic level of knowledge of ArcGis Pro. I need to establish a "least cost path" between a point and a line, which, in this case, is the coastline. What is the procedure?
- 1
0
votes
0
answers
23
views
Least Cost Path Pluging - points ID
I am using the Least Cost Path Plugin (https://plugins.qgis.org/plugins/leastcostpath/), which works perfectly. The "id" produced in the "output least cost path" layer takes a ...
0
votes
0
answers
17
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 ...
1
vote
0
answers
31
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 ...
- 11
1
vote
0
answers
54
views
Incomplete set of least cost paths in R
In R, generate a conductance raster with "square" cells. Now derive the centroid of each cell and compute the least cost paths (LCPs) between each pair of centroids through any of the ...
- 11
1
vote
0
answers
51
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 ...
1
vote
0
answers
138
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 ...
- 511
0
votes
0
answers
38
views
Auto generation of a line of predetermined % grade across a raster DTM using QGIS or Whitebox GAT
I have used QGIS for the purpose of trail routing through relatively steep terrain, often ranging from 45-60˚ slope. I have achieved fairly accurate routing of desired trail alignments at 15-20% ...
1
vote
0
answers
33
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 ...
- 465
1
vote
0
answers
132
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 ...
- 11
0
votes
1
answer
84
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 ...
- 49
0
votes
1
answer
49
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 ...
1
vote
1
answer
181
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 ...
- 1,536
1
vote
0
answers
47
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&...
- 11
0
votes
0
answers
104
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 ...
1
vote
0
answers
29
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 ...
- 119
1
vote
0
answers
104
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/...
- 11
1
vote
1
answer
771
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 ...
- 1,536
2
votes
1
answer
136
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 ...
- 123
0
votes
0
answers
72
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 ...
- 105
0
votes
0
answers
44
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 ...
- 65
0
votes
1
answer
100
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 ...
- 105
3
votes
1
answer
222
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 ...
- 33
1
vote
0
answers
84
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 ...
- 11
1
vote
0
answers
47
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 ...
- 43
1
vote
0
answers
96
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 ...
- 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 ...
- 29
1
vote
0
answers
72
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 ...
- 113
3
votes
1
answer
808
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 ...
- 89
0
votes
0
answers
78
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 ...
1
vote
0
answers
92
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 ...
0
votes
0
answers
107
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 ...
- 13
6
votes
0
answers
108
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 ...
1
vote
1
answer
109
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 ...
- 19
-1
votes
2
answers
34
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,...
- 71
1
vote
1
answer
612
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() ...
- 21
2
votes
1
answer
133
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 ...
- 41
1
vote
0
answers
112
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" ...
- 71
2
votes
1
answer
74
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 ...
- 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°...
- 21
0
votes
1
answer
144
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 ...
- 113
1
vote
1
answer
1k
views
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 ...
- 289
0
votes
1
answer
48
views
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
0
answers
70
views
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 ...
- 29
0
votes
0
answers
331
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 ...
3
votes
1
answer
2k
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 ...
- 119