Use for questions about vector features and their proximity or nearness to other features.

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1answer
17 views

Keep “no data” tiles as “no data” w/ proximity (raster distance) operation

Working in QGIS 2.8.1 Wien. I have a raster file with three classes: "No data" for tiles outside of the country of interest's bounds "0" for tiles that correspond to roads "1" for all other tiles. ...
5
votes
1answer
57 views

How to group 10k points into closest pairs?

I was first faced with a problem of grouping 1000 pairs into unique pairs to minimise the total distance - since this was a small number I solved it using linear optimisation: Part 1 - Basic/Naive ...
0
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0answers
24 views

Using Near Feature Tool with Conditions

I am using near feature tool in ArcGIS 10.1. However, I need to add another condition to it (not only the nearest). The feature (point) that i am looking for, is the nearest (point) and also doesnot ...
1
vote
1answer
15 views

Reclassify a raster based on proximity to other cells in the same raster

Using Arc 10.2.2 with the Spatial Analyst extension, I have a single band, signed integer, 8-bit raster. I need to reclassify cells within that raster based on their Euclidean distance to other cells ...
2
votes
1answer
35 views

GeoSpatial queries and indexes in memory

I am currently using Spark/Scala to process some data, and I am at the point that I need to run ~3M of geospatial queries. One common solution would be using MongoDB or PostGIS (or Magellan for Spark ...
1
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1answer
41 views

Finding distance to closest road (polygon to line) in ArcGIS for Desktop?

For my project I need to find the distance to the nearest road from forest polygons. I'm trying to do a weighted overlay analysis (eventually) for a habitat selection project so I think I need to end ...
3
votes
2answers
49 views

Knowing if there is correlation between roads and observations in ArcMap?

I am using ArcMap 10.3.1. I am trying to find out whether some observations have been made randomly throughout a landscape, or they are biased towards the location of roads and paths. I have a ...
4
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2answers
47 views

Least Cost Path Distance to nearest polygon

I have multiple polygons (destinations) and an elevation raster. For each raster cell in my study area, I need to calculate the distance to the nearest destination polygon. If I use the 'as crow ...
7
votes
2answers
70 views

Creating a point on edge of closest polygon

My project is looking at a grid in the ocean. I want to capture each ocean point's distance to the nearest coastline as a weight, and then use buffer to capture the sum of nightlight data within a 1 ...
0
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2answers
22 views

Points proximity to polygons in ArcGIS for Desktop?

I have a point feature class with 1725 records (spread out over NYC) and a polygon feature class with 13 records (also spread out over NYC). What tools or processes can I use to figure out what ...
2
votes
2answers
69 views

Average value of polygons within a set distance from a point

I have two vector layers: one polygon and one point layer. The polygon layer has a value from 1 to 10. I am trying to find the average value for all polygons within or partly within a 1-mile radius of ...
0
votes
1answer
26 views

Snapping point to point nearest to it in ArcGIS for Desktop?

I am using ArcGIS 10.3 for Desktop. I have 2 point features centroid and station. I want to snap all the points of centroid to the nearest point in station such that centroid is only snapped with ...
0
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1answer
21 views

Using Generate Near Table and keep the ID attributes

I try to use near table between two datasets to calculate the nearest distance. The original data is as the right one, and the near table generated is as the left one. The problem is the attribute of ...
0
votes
1answer
44 views

Using Near (proximity) tool in ArcGIS for Desktop?

I've tried changing GCS and PCS multiple ways but can't seem to figure out how to get the Near (from Proximity tools) to output the Near_DIST in feet. All it outputs is what looks like decimal ...
0
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0answers
10 views

How to get feature ID correctly in Near table?

I have generated a near table using ArcToolbox, and there are 50 points in two datasets. The feature ID for input and near are quite bigger than normal, as the left one in the enclosed picture. I have ...
0
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0answers
22 views

Meaning of zero in fromxy/toxy of ArcGIS Near 3D tool?

I am using ArcGIS 10.2 for Desktop. I am running the near tool for points with different attributes. Many are in the same location, so I would expect the Near_DIST3 to be zero and the location of the ...
2
votes
2answers
66 views

How to find the closest segment to a point

I am trying to find the closest road segment to a point that I have and return an attribute from the closest segment to the given points. I know in PostGIS I need to use ST_ClosestPoint, ...
2
votes
1answer
42 views

How to calculate proportion of a line segment around a point?

I am looking at certain variables surrounding points that represent Sea otter raft sites. The coast line surrounding the points is broken into unit lines (Essentially a polyline with attributes for ...
2
votes
1answer
77 views

Nearest line feature from point using ArcGIS for Desktop?

In the image given below, solid lines are showing as road elements and points are showing as data collected for those road segments. I want to update road element id to the points shapefile. "Near" ...
1
vote
1answer
64 views

Calculating emissions from points in road network using ArcGIS for Desktop?

I have GPS data (X,Y, speed, CO2 and fuel consumption) for one truck for one trip. I want to import them in ArcGIS and to join them with the road network (map matching). I was thinking of applying ...
0
votes
2answers
67 views

Complete matrix from Generate Near Table

I am trying to make a matrix with all the distances from 4000 objects to 1000 other objects. I used the Generate Near Table and deselected "find closest option only". The output is table with 4 ...
0
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0answers
61 views

What QGIS tool or plugin is equivalent to the ESRI “Near” tool?

Using QGIS 2.10.1 I need to determine the distance from each feature in layer A to its nearest feature in layer(s) B or C or... ESRI has this capability with their "Near" tool: ...
2
votes
2answers
49 views

Deleting some observations in near table?

I created some near tables, with a max near distance of 8000m. It is extremely timely exporting these files to csv right now. Is there a quick way in ArcGIS to delete observations that have a ...
1
vote
2answers
63 views

Finding points within distance of polygon using ArcGIS for Desktop? [closed]

I have several polygons(areas) and points(with names of places) on two different layers. How would I go about finding all of the points that reside within 100m of the polygons I have on the other ...
5
votes
1answer
107 views

Dividing polyline layer in clusters with specific requirements in ArcGIS for Desktop?

For my work in ArcGIS 10.2 for Desktop I need to divide line layers into clusters/groups. Currently I am doing this manually, but I like to automate this. The line layers can consist of 50 up to 2500 ...
1
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0answers
23 views

How to use 3d analyst tool box?

Can you tell me how to check and select horizontal and vertical distance within criteria in 3D analyst tool. I tried near 3D tool but I cannot get clear information. Ex: horizontal dist 3m ...
1
vote
1answer
49 views

Calculating Closest Distance Between All Combinations of Set of Polygons using ArcGIS for Desktop?

I'm looking to calculate all combinations of the closest distance 2 polygons in a set of polygons in ArcMap 10.2.2. I have an advanced license. I'm assuming it has something to do with the Proximity ...
0
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0answers
20 views

Calculate near distances using drive time distances

I know that you can calculate the drive time distance between two points on ArcGIS. But, is it possible to combine the generate near table tool with drive time distances? I have an input feature, a ...
1
vote
2answers
62 views

Computing the Vertical Nearest/Shortest Distance in ArcGIS

I have a shapefile containing around a hundred points (lat/longs). And, I have a shapefile that contains a polyline representing a river. The river is somewhat horizontal (runs east to west) but ...
0
votes
2answers
36 views

Calculate how many points a route goes through

Is there a way in which a route mapping interface can determine how many points a certain (user created) route has 'touched'? In the sense that firstly: I have a set of markers or points (e.g. ...
1
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0answers
15 views

Expression geomnearest not found

I have been making some new printer composers in a project I am working on in QGIS. I had implemented the use of expressions to create content for the title block, one of these is the geomnearest ...
2
votes
1answer
46 views

How to reduce points by proximity

I got a layer with over 4 million points. The distance between the points are 1 meter. How can i reduce the data so that no points have less than e.g. 10 meters between them?
0
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0answers
25 views

explain generate spatial weight matrix k-nearest nieghbor results

I successfully generate 8th nearest nieghbor matrix and open it in excel, but I am confused about what the weight field mean it shown in the picture below since I generate the 8th nearest neighbor I ...
1
vote
2answers
64 views

Selecting nearest 300 buildings (polygons/centroids) from list of points using ArcGIS for Desktop?

I have been trying to look for an easy/quick way to select a certain amount of polygons (layer 1) from a 90 points shapefile (layer 2). The idea is to identify the nearest 300 buildings from each of ...
1
vote
1answer
198 views

driving time to the nearest facility using pgrouting

I'm using pgrouting 2.0 and postgis in postgresql. My problem is to calculate the driving time to the closest facility for each node of my OSM derived network. These are the steps to be implemented ...
1
vote
1answer
50 views

Generate near table failed

I have been generating near tables for the nearest neighbour, for weeks now with the same files, but when I tried it today it would not work. Here is a snapshot of the error. I also have one input ...
1
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0answers
38 views

Nearest neighbour / spatial join with attribute condition

I have 2 point format datasets I wish to schematically join (manholes & gullies). I am content that I can join them by nearest proximity alone using e.g. NNJoin plugin. What I would like to do ...
2
votes
1answer
49 views

Is nearest search done on Euclidean plane accurate

I am writing a program which will find all the points within 1km. I am planning to to do this on a Euclidean plane as my database only supports Euclidean plane or sphere indexing ...
1
vote
1answer
112 views

finding the nearest point along the edge of a polygon

I have a polygon shapefile which represents a study area (island). I also have a point shapefile representing some villages. What I am after is to locate for each village point the nearest point along ...
0
votes
0answers
47 views

Finding proximity to waters, such as lakes, rivers, streams, the oceans

At Alz.care, we are working to detect whether someone who is living with Alzheimer's is nearing a body of water, because of the very high risk of drowning for persons with that neurocogntive disorder. ...
1
vote
1answer
31 views

Search radius for some intermediate distance

ArcMap on my laptop runs very slowly. So it can take a long time for a near table to run. Is it possible to use a search radius for some intermediate distance? For example, the search radius only ...
1
vote
1answer
35 views

Joining table to a near table

I calculated the distances between one set of xy coordinates and another set of xy coordinates. So my near table has the ID variables, distance and rank. However, when I join the near table to the ...
0
votes
1answer
93 views

Distance to coastline?

I have a shapefile of Ireland, and some xy coordinates plotted on top of it. Is it possible to calculate distance to the coastline, for each XY? I am an ArcGis beginner.
1
vote
1answer
37 views

Closest feature at angle using ArcGIS for Desktop?

I have points representing where street light poles meet the ground. I also have the angle which the mast arm is facing. We use this to symbolize the features by showing the mast arm over the ...
2
votes
1answer
32 views

Extract maximum raster value within a set radius to a point

I have lines (rivers) that don't exactly match a raster grid (flow accumulation). If they were exact, I could just extract the raster values to points I put along those lines. However the raster ...
0
votes
0answers
28 views

Near table in ArcMap advanced

I am trying to generate the nearest distance from one set of xy coordinates to another set. Each of the two datasets has the variables: X, Y, id I generated a near table to do this (and some other ...
0
votes
0answers
46 views

Measuring Distance in ArcGIS Desktop?

im a Mastr student an i want your help in a practice . ive sampled soils around a lake to study the pollution in the study area . how i can measure the distance between every point in the samples ...
0
votes
1answer
118 views

nearest point distance in Arc Map

How do you calculate the nearest distance from one XY coordinate to another XY. I'm using Arc Map 10 I went into Arc tool box -> proximity -> then I only have 2 buffering options. But under buffer ...
1
vote
3answers
274 views

pairwise (linear) distance between points of the same shapefile

Given a set of points representing villages stored in a .shp file, is there a way to compute the pair-wise distance (Euclidean) between them? What I would like to come up with is a sort of symmetric ...
2
votes
2answers
126 views

Calculate nearest distance in ArcView, XY coordinates

I am really lost and struggling because I have never used an Arc system before. I have two datasets. One with house locations, and the other with investment locations- each locating by XY coordinate. ...