Questions tagged [boundaries]

For questions related to data for boundaries of real world features, such as those of administrative regions, cities, and towns.

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29 views

Offline Editing

Hello qfield team support. I work on project that I have 3 layers and the editing is on one layers. I would like to freeze the other layers. I want the boundary and control point just display not Edit....
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1answer
65 views

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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1answer
46 views

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: ...
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2answers
75 views

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 ...
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38 views

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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31 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) ...
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1answer
55 views

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 ...
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16 views

Adjusting polygons layers's boundaries in PostGIS [duplicate]

The case is quite typical. I’ve to compare two (multi-)polygons layers of administrative regions, with l2 being lower level (let’s say municipalities – 2811 records) than l1 (let’s say provinces – 785 ...
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3answers
112 views

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 ...
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1answer
17 views

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
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1answer
41 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))'), ...
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2answers
177 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 ...
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0answers
75 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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1answer
56 views

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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1answer
28 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 ...
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3answers
33 views

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, ...
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22 views

OSM street nodes across postal code boundaries [duplicate]

Querying a street on OSM may result in multiple matches for the same street if it spans a postal code boundary (i.e. parts of the street have different postal codes). How can all nodes for the street ...
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0answers
40 views

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 ...
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0answers
84 views

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 ...
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35 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 ...
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2answers
208 views

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 ...
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1answer
88 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" ...
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38 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 ...
2
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1answer
279 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 ...
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1answer
20 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 ...
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1answer
23 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 ...
2
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1answer
237 views

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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24 views

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 ...
2
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1answer
161 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 ...
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1answer
159 views

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 ...
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0answers
33 views

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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0answers
42 views

Exclusive Economic Zone (EEZ) and Regular Boundaries one shapefile

Does anyone have an idea if there is a shapefile of the merged EEZ boundaries and regular administrative boundaries? I need this data for entire Africa. I have downloaded the EEZ boundaries from http:/...
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1answer
311 views

QGIS boundaries of many collected polygons

QGIS 3.4 LTR I have a layer with many polygons. I want 2 symbols for them in this layer : The first is one color for all (ok...). the second is the boundary of the polygons grouped by an ...
3
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1answer
147 views

Why does Google Maps display strange, jagged state boundaries in the Great Lakes?

When I search for a state on Google Maps, I am shown the state outlined in red. I've noticed that the states that border the Great Lakes have boundaries that protrude into the lakes in strange ways. ...
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0answers
360 views

Finding boundary coordinates of user current location with a given radius

I have my current lat and lng details { "lat": 8.561032, "lng": 76.846333 } And from this I need to build a boundary around me with given radius. So How can I get the boundary ...
2
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1answer
244 views

Joining attributes of census tracts with neighborhoods in ArcGIS when the boundaries don't match up perfectly?

I have a shapefile of Montreal census tract boundaries (below left), where for each tract I've joined data for 17 census variables including population, land area, total private dwellings, etc. I ...
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1answer
34 views

How to locate the US zipcodes at the boundary of a state, say Wisconsin

I would like to identify all the zipcodes at the boundary of a certain state. For example, 53566 Monroe belongs to the southern boundary of Wisconsin. I am wondering if there is any way to do this ...
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1answer
43 views

Building query with st_shared in QGIS

I have a table with county polygon boundaries (named "counties"). I need to build a query that identifies a particular county as well as any adjoining counties that share the same border. Have tried ...
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0answers
466 views

Break a bounding box into smaller boxes (coordinates)

My objective is to create a collection of bounding box coordinates that I can supply to a search function. The idea is that I have the search function search smaller geographic areas, instead of one ...
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1answer
347 views

Eliminating gaps between polygons using ArcMap?

I work in ArcMap 10.4 with an Advanced level license. I'm searching for a fast and effective method for eliminating gaps between polygons, so that one polygons follows boundary of the other. In other ...
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2answers
1k views

Filtering out data points on water or outside specified polygons using QGIS?

How do I filter out points that lie in the water or outside specified polygons? For example I want to filter out the erroneous points in the oceans in one project, and filter out all points not in ...
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1answer
394 views

Minimum and maximum coordinates of a polygon in Earth engine

I have a Fusion table having shape-files of various districts of India and I am using this fusion table in Earth Engine code. var district = ee.FeatureCollection('ft:...
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1answer
56 views

Create a attribute based on what polygon point features are located inside of

I have two polygons that delineate two site boundaries. I have a bunch of point features inside the polygons. Is there a way to create a attribute that indicates what polygon boundary the point ...
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1answer
44 views

Summing data from a smaller boundary shapefile to a larger boundary shapefile if the boundaries do not align in ArcGIS Pro?

I have a census tract boundary shapefile for the province of BC, with around 620 polygons, varying in size. I have another boundary shapefile, BC service areas, this one has much larger polygons and ...
2
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1answer
236 views

Display adjacent polygons without the shared borders becoming darker than the others?

When plotting adjacent polygons, for instance, the states of a country, the lines are usually thicker/darker in the border between two polygons, compared to a polygon on the edge of the map. That ...
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0answers
45 views

Missing Data in District Boundaries

I was required to download my countries road data from OpenStreet Maps for a project I'm currently working on. For this I used the OSMnx Library. However, as my RAM was insufficient to download the ...
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1answer
269 views

Export boundaries as gpx file from Open Street Map?

How can I export the boundaries of this area as GPX? Is there any way? https://www.openstreetmap.org/relation/1595533#map=14/50.8945/14.3287 Background: I'm planing a hiking tour through the ...
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3answers
1k views

Extracting single boundary from multipolygon in PostGIS

I am trying to find a single external boundary either polygon or line from the multipolygon using st_boundary in PostGIS query. The function doesn't work. What could be the issue?
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1answer
88 views

Fill raster to shapefile boundary

I created TIN from contour lines, then I convert this TIN to Raster. After that I clipped the raster by Extract by Mask tool, now the problem is raster does not fill whole boundary. Below image show ...
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1answer
417 views

How to extract 1 band image (Boundaries) in Google Earth Engine Code Editor

I am quite new in remote sensing and trying to get boundaries of fields to build a prediction model in R. I tried Canny and Hough algorithms but the results are not satisfying. Lastly, I tried the ...