Questions tagged [boundaries]
For questions related to data for boundaries of real world features, such as those of administrative regions, cities, and towns.
139
questions
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2
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16
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Unable to join data from another layer
I have two polygon layers, I want to join the data based on the location from one layer to another layer. But only field is joining not the data.
In image green is one layer and red is another layer. ...
- 259
2
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0
answers
43
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Merging layer features by boundaries
I'm trying to combine the features from a layer in QGIS by distance. Basically I have the following layer with some features.
I wanted to remove the small gaps (as seen in below image) between them.
...
1
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0
answers
17
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How to transfer/split the boundaries of single IDs from one shapefile to another
I did a Land Use Land Cover Classification from a satelite image and converted the result from raster format to a polygon shapefile. Now I want to split the single polygons to the boundaries of ...
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1
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0
answers
26
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Eliminating overlaps and gaps between polygons using ArcMap
I work in ArcMap 10.8 with an Advanced level license.
I work with geological maps. In particular, the scale is 1:500000. I have a lot of line objects (different elements of a relief) that have common ...
1
vote
1
answer
19
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Can't make sense of (UTM?) boundaries coordinates from Statistics Canada
I downloaded a GML file of cities boundaries from Statistics Canada, but I can't make sense of them. For example, when looking at the boundaries for a city north of Toronto (Markham), the first ...
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8
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3
answers
286
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Calculate length of common boundary
I have two different layers, the pink and the blue one. The green polygon is given by the intersection of the other two layers. I want to calculate the length of the common boundary line between the ...
- 161
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0
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11
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Extracting the channel banks' shapefile segments
I want to extract separate lines for left banks and right banks of a large channel network, and doing it manually sounds too tedious. Is there an efficient way to extract the polyline or vertices of ...
- 113
2
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0
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45
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Boundary Placement in QGIS 3.x
in ArcMap there is a great function for polygon labels - boundary placement. So at the boundary with a new polygon the labels of both polygons are displayed opposite each other.
Is it possible to do ...
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18
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Finding(drawing) interior, boundary and closure of given 2D visual representation of topological space
I'm currently studying for my exam in Geospatial Databases.
We're given a visual topological space (picture below) and we need to draw the interior, boundary and closure of this space.
I understand ...
3
votes
2
answers
118
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Clipping vector layer with preserving boundaries of polygons in QGIS
I would like to clip a vector layer containing buildings by a rectangular boundary (also a vector layer). However, rather than cutting straight through the buildings at the boundary, I want it to ...
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0
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16
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Align polygon borders by underlying raster values
I have an interesting problem: I have polygon borders that correspond roughly to "value-boundaries" in a raster (areas where the raster values are clearly distinguishable between two areas).
...
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2
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1
answer
55
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Clustering of points but with a condition of not crossing set of lines
I have multiple sets of around 200-300 points and I have the following requirements:
Cluster the points in each set into a group of points with a minimum
& maximum number (as defined by me).
In ...
- 43
4
votes
2
answers
224
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Creating different kind of outline for many polygons in QGIS
Is it possible in QGIS 3.4 Madeira to change stroke width on number of polygons?
But I want only to outer boundary be different thicker line and I want to inner boundary remains thinner.
Example:
All ...
- 49
4
votes
1
answer
400
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Higher resolution of country borders
I have been looking and looking for a long while, but I was unable to find any freely available datasets for country borders with resolution higher than 1:1000000. I found this strange as I thought ...
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42
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ArcMap minimum bounding geometry around groups of lines massive spike stretching far into the distance
ArcMap 10.4.0.5524 for Desktop. No internet connection.
I have a bunch of lines that represent roads. I would like to make convex hulls to isolate groups of these roads. When I do this in ArcMap, a ...
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0
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41
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Grouping polygons by maximum sum of attribute using ArcGIS Pro
I have an exercise with several boundary polygons with the fields "number of cat owners" and "owned cats" inside the area.
Sample Data
polygon ID
cat owners
cats
1
4
12
2
2
3
3
...
2
votes
3
answers
109
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Avoiding buffer exceeds layer boundaries in QGIS
I generated random points within my map in QGIS. Then I created a buffer zone of 5km around each point because it is necessary for my analysis.
However, now the buffer zone crosses over the layer ...
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3
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0
answers
74
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Adding attribute of polygon orientation depending on neighbors in QGIS
I have a shapefile with buildings as polygons. Is it possible to add attribute columns referring if the polygon boundary is "other polygon" or "outdoors" for a certain orientation (...
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0
answers
10
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How to find average distance of points in polygon to boundary of polygons?
I have a layer of polygons and a layer of points that I lay on top of those polygons. Some polygons, which I will refer to here as "zones", will contain 1 point within their boundary, and ...
4
votes
1
answer
75
views
Defining river boundaries so that TIN interpolates within those boundaries
I am a new QGIS user just learning the product. As part of our works we take depth soundings around river bends. I have worked out how to do basic contours with colour bands in the background using ...
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1
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0
answers
54
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Generalise low resolution World Bank boundary data
I'm trying to generalize World Bank Official Boundaries:World Boundaries GeoJSON - Low Resolution from https://datacatalog.worldbank.org/dataset/world-bank-official-boundaries using QGIS 3.18.3, using ...
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1
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43
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Polygon coordinates are wrong after shapefile import
I have shapefile I have imported, but the polygon coordinates are wrong. Was the shapefile exported incorrectly or is there something I'm missing.
Point 30.8843 -29.9688 should fall in the boundary.
5
votes
1
answer
382
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Finding distance from points to the boundary of the nearest polygon in Python
I asked this question on stackoverflow.com but it seems that doing so here is a better option.
Context: I want to compute the distance from points to the closest boundary of the closest polygon to ...
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1
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1
answer
245
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Extract administrative boundaries with physical borders at the coast line from OSM data
I successfully downloaded the OSM data from https://www.geofabrik.de/ and converted the .osm.pbf file to a .gpkg using og2ogr. Now I want to extract administrative boundaries using DB-Manager and SQL:
...
- 1,444
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2
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124
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How to move data according to the distance [closed]
I have a data in the shapefile format. Now I have to move them according to the boundaries. Is their any solution to move according to the distance without manually. I want to select the data with ...
- 259
1
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0
answers
118
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Find nearest boundary of inner feature (Turf.js)
Imagine a GeoJSON FeatureCollection that contains a boundary and a feature.
The feature should be thought of as a Building and the boundary as a plot of land.
When rendered this shows the follow https:...
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1
vote
0
answers
50
views
Edge detection from Google Earth basemap in QGIS
I would like to detect boundaries of agricultural fields for 70 different polygons spread out across a country.
Is it possible to run an edge detection algorithm using the google earth (or equivalent) ...
- 93
2
votes
1
answer
178
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Get footprint or boundary of LIDAR data
I am using the lidR package in R to manage my ALS data. I was having problems generating DTMs on the edge files of my catalog because the tool lidR::grid_terrain() was doing some interpolation between ...
- 333
-1
votes
3
answers
537
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List of extreme latitudes and longitudes for each US state?
I need a list of extreme latitudes and longitudes for each US state. That is, max / min latitude, max / min longitude.
The purpose is to exactly center each state map when initially shown.
I found ...
0
votes
1
answer
37
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Bounding Areas using Feature Collection values (RESOLVE Ecoregions 2017)
I'm pretty new to the Earth Engine and have been working through some of the tutorials to familiarize myself with it. I have very little code experience.
What I am trying to accomplish is creating a ...
2
votes
1
answer
59
views
Is this ST_Relate result expected?
The following PostGIS query involving ST_Relate gives FFFFFF102 as its result:
SELECT ST_Relate(
ST_GeomFromText('POLYGON EMPTY'),
ST_GeomFromText('MULTILINESTRING((0 0,0 1),(0 1,1 1,1 0,0 0))'),
...
- 123
3
votes
2
answers
412
views
Draw circles around points
I have a CSV layer of points which I have succesfully imported into QGIS. My assets are a bit like wireless access points and I cannot have any of the points on the same channel within 2km. I ...
- 51
3
votes
0
answers
91
views
Identifying which shared boundary is longest using QGIS
This is an evolution from How to specify dependable layer names in QGIS Processing Modeller but should be considered completely separately.
I am creating a model in QGIS (3.10.3) Processing Modeller (...
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1
answer
78
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Determining if species point data is upstream or downstream of artificial fish passes using ArcGIS Pro
I am working with ArcGIS Pro.
I am working on a project to determine how to prioritize restoration of artificial fish passes. I have been supplied with species point data, point data of the artificial ...
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-1
votes
1
answer
35
views
Change pixel values of the open Sea to noData values
I want to calculate, which land areas of my elevation raster data set are under a specific elevation height. The open sea with pixel values of 0 should not be included in the analysis. I want to ...
0
votes
3
answers
44
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Separate boundary from adjacent polygons [closed]
I have a list of polygon features that share a common boundary. Is it possible to extract that line somehow? I am thinking about making a spatial join that shows me polygons that share a line segment, ...
2
votes
0
answers
63
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Empty pixels in polygon border
I have a vector shape file with the basins of South Carolina. Some of the sub-basins polygons have a "hole" or no data pixel in their boundary (See photos for reference 2) and I need them to ...
- 51
1
vote
0
answers
155
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Display the loaded tiles with out cropping in leaflet boundary canvas
I am using boundary canvas plugin to display the tiles belongs to polygon drawn area.
Presently tiles outside the polygon boundary is getting cropped while adding to map. But I wanted to display the ...
- 11
0
votes
0
answers
161
views
ArcMap Basic License - Create exterior boundary around polyline features based on centerline layer
I have access to ArcGIS with a basic license at work. I have been tasked with creating a boundary outline of every route polyline feature whose shape is also based along the city street network base ...
- 199
5
votes
2
answers
269
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Identifying tree stand boundaries
I have a forest area, where I need to identify all the dividing lines between tree stands. I have a different amount of rastar files (RGB, NIR, DTM, DSM), and need an output with the boundaries as a ...
- 331
2
votes
1
answer
527
views
Selecting features by location in QGIS (boundaries_touches)
Is there a tool or function in QGIS which can select features of one layer which are located on the boundaries of another layers features? In ArcGIS it's the "select features by location" ...
- 161
0
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0
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39
views
Buffer around suburb lines
I am using QGIS 3.6.3 and I am an amateur QGIS user.
My QGIS project currently has a map outlining suburb boundaries in New South Wales, Australia. I am wondering if I can create a buffer around ...
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2
votes
1
answer
663
views
Extracting outer boundary of polygon (current polygon merged to one row but layer has holes creating small polygon needing removal) using ArcGIS Pro
I had to create boundary of raster layer, so I used raster to polygon to get the boundary. But the boundary has many holes based on the original raster which I want to get rid of as I only need the ...
- 51
1
vote
1
answer
31
views
Levelling an existing site in DSM for viewshed analysis in GrassGIS
I'm doing a multi-point viewshed analysis for an urban site in GrassGIS based on a LIDAR DSM raster maps, to test for a series of proposed buildings. The site has existing building on them.
Is there ...
0
votes
1
answer
24
views
Is there a standard vernacular for levels of political boundaries (specifically city, county, state, nation)
While building a geotemporal web app, I found that virtually all countries followed this simple four-level structure, akin to what we in the US of A call: city, county, state, nation.
However, most ...
- 109
2
votes
1
answer
484
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Getting only the exterior boundary of a 'donut-shaped' GeoSeries object
GeoSeries.boundary() finds the entire object's perimeter, so I supposed that wouldn't work.
I made my GeoSeries donut-like shape using unary_union of smaller GeoSeries objects.
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0
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0
answers
39
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Superpixel segmented image boundary into SpatialPolygons format
I have an image mask segmented through superpixels algorithm like this.
I want to just extract its boundary and save it as a shapefile SpatialPolygons for using spatstat. Can anyone help on how to go ...
- 101
2
votes
1
answer
279
views
Adding a land survey to QGIS Canvas
I'm having difficulty adding land survey information to QGIS. What I need to do is add the survey boundaries of oil and gas leases, so that I can overlay additional data associated with land ...
- 191
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1
answer
310
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Need Dominion Land Survey (DLS) grids loaded into QGIS for province of Saskatchewan in Canada
I found a source that allows the download of a shapefile for the grid system for Alberta, but am still in need of the same thing for the entire Dominion Land Survey Grid, or just Saskatchewan.
I'm ...
1
vote
0
answers
54
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Loading specific area from an osm.pbf file into Maperitive
Is there a way to download a specific longtitude / latitude boundary area (a city) from a country osm.pbf file in Maperitive? In my case I am trying to load Greater Sydney from http://download....
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