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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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6
votes
1answer
99 views

Getting Disputed Boundaries

I am using the OSM Boundaries Map 4.0 to download the boundaries of the countries. The problem is that I want to include the disputed boundaries for countries such as Bhutan: Is there anyway of ...
6
votes
1answer
970 views

Creating/generating LDU polygon boundaries of Canada?

Back Ground on issue: http://www.opennorth.ca/2013/03/05/open-postal-code-data-now.html Related Question: Where can I find Canadian postal code geometries? Canada Postal Unit: LOR 1B7 Canada has ...
4
votes
1answer
123 views

Avoiding gaps of data on edges after clipping a raster?

After using interpolation and clipping the grid I get the result you can see on the picture below. Next to the boundaries there are a lot of gaps caused by the raster cells. These gaps are problematic ...
3
votes
1answer
72 views

Showing only outer Fishnet boundaries

I have a fishnet layer where some empty cells are nested within. I'd like to only show the boundary of the filled cells (color set no fill, but no inner cell boundaries of adjacent cells). How can I ...
3
votes
2answers
261 views

ST_ConcaveHull interaction with ST_Boundary

I am trying to run a st_concavehull after st_boundary/st_exteriorring on polygons, however st_concavehull doesnt seem to reinclose the polygon properly. For example SELECT ST_GeomFromText('POLYGON((-...
3
votes
1answer
204 views

PostGIS ST_MakeEnvelope size direction change on geography

This doesn't really effect me but I was just wondering if you find this a little bit strange or not. I think this issue is probably cause of this question also but I think the accepted answer does not ...
3
votes
1answer
110 views

PostGIS function testing geometries, inside and boundary

Is there a st_????(A geometry, B geometry) in PostGIS that returns true when B is inside A and possibly shares a boundary ? I would say no after reading the doc but something may have escaped me.
3
votes
4answers
2k views

Does Google Maps API or OSM provide location/place boundaries

I've been digging around today in Google Maps and Leaflet API's to find if there is an easy way to get these boundaries instead of needing our users to manually outline these things (like drawing ...
3
votes
1answer
313 views

Get exterior ring of a multipolygon using GEOSGeometry or PostGIS

I am trying to get the exterior ring of the multipolygon in the image below using GEOSGeometry (through GeoDjango) or Postgis, but I have not found an easy solution. This is an example of a ...
3
votes
1answer
648 views

Distance from within boundary in Shapely

I'm new, although I am reasonably experienced in Python. My question concerns Shapely, a library for spatial data. I am trying to assign some points as being within some distance d of the boundary of ...
2
votes
3answers
1k views

Removing black pixels of georeferenced image without affecting interior pixels using GDAL?

I am looking for an algorithm or function in GDAL that can remove black pixels out of image boundaries. Note that I've tried gdal_fillnodata (gdal.FillNoData) and the result was good in most cases; ...
2
votes
1answer
88 views

How can I color code national vs subnational boundaries in QGIS?

I'm trying to make a regional map of West Africa at the subnational level. I can't seem to figure out how to distinguish the subnational and national boundaries - right now, they're all black, and I'd ...
2
votes
1answer
161 views

Separating parcel polygons that share boundaries in ArcMap?

I have parcels in one layer which are simple polygons. As one parcel is against it's neighbor the lines of that boundary are shared. This makes it very difficult to symbolize the parcels in different ...
2
votes
1answer
36 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 ...
2
votes
3answers
197 views

Smooth Edges of polygon in postGIS

I have a shape that looks like this: It's the end result of a buffer, merge, bugffer and Chaikin Smoothing process in PostGIS. It's almost perfect however I'd like to remove some of the "fissures". ...
2
votes
1answer
43 views

Boundary of merged parcel feature does not disappear after merge

In QGIS, when I merge several parcel features using Merge Selected Features, some of the boundary of parcels still remains. Steps I used: Enabled snapping options. Enabled Toggle Editing. Select Add ...
2
votes
2answers
364 views

QGIS create boundaries from background image

I want to manually trace over an existing map image to replicate the boundaries using QGIS. If this was an existing polygon and I need to split this into 3 separate polygons, I would take the ...
2
votes
1answer
62 views

Boundary of MultiLinestring in DE-9IM

can somebody help me understand (probably giving visual examples) what does this sentence mean which is quoted from the wiki page of nine intersection model: Those points that are in the boundaries ...
2
votes
0answers
134 views

GeoServer CSS label along polygon boundary - overflow

I labeled a polygon along it's edge by using the boundary of an inside buffer: label-geometry: [boundary(buffer(GEOM, -0.01))]; This works, but my problem is, that at certain zoomlevels/positions ...
2
votes
0answers
42 views

Polygons hull QGIS [duplicate]

I'm currently working with old french cadastre on QGIS, I've vectorised it and now I want to tile it. I've georeferenced it, but it's not sufficient for a great result. To improve the result, I would ...
2
votes
0answers
182 views

How to get points within boundaries which overlaps the anti meridian

Within my application I have a map and I'm showing markers on the map which represent objects that I get from the database. The objects have latitude and longitude. The objects are selected only if ...
2
votes
0answers
334 views

postgis st_relate polygon inside another and sharing a boundary

I am trying to select polygons inside an other one WITH a common boundary. It seems that st_relate is the way but I can't find the right matrix, even if I don't see where the fault is in : st_relate(...
2
votes
0answers
502 views

Wrap the set of points to the minimum polygon

Given I have a set of points which represents the circles which are intersected. As result I'm trying to receive the boundary which represent the polygon which wraps all circles. Please take a look ...
1
vote
3answers
126 views

Looking for Parish Boundaries Datasets for QLD Austraila

Every so often, I am asked for a parish boundary dataset. I can never find them as I am of the belief that they are no longer used. Has any one had any experience with parish boundaries in Australia (...
1
vote
3answers
165 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?
1
vote
2answers
39 views

Getting features for one polygon into another, Geometries do not line up using ArcGIS Desktop?

I have: - Census Blocks - Taxi Zones The taxi zone shares a rough boundary with census blocks, but there are times where there is overlap due to a rough outline(In image, red line is Taxi Zone, ...
1
vote
2answers
181 views

Using ArcMap Topology to make admin boundaries match up?

I have two separate datasets ('Wards' and 'Census Output Areas'), whose boundaries don't quite match up (see below - wards in red, COAs in grey). Is there a way of automatically adjusting the Ward ...
1
vote
1answer
32 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 ...
1
vote
2answers
59 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 ...
1
vote
1answer
443 views

Merging boundaries with boundary shapefile in ArcMap?

I have a boundary shapefile of a city with 19 district boundaries, and I need to reflect some changes and create 16 districts instead. Boundaries I want to merge are all neighboring districts (two ...
1
vote
1answer
50 views

Points drawn outside a certain area get placed on perimeter of smaller area

I am trying to add points to a table in MapInfo (geologic map) but cannot get points to display in correct location. Are there boundaries for tables? How to change this? I'm using Mapinfo 10.5.
1
vote
1answer
112 views

Looking for the census blocks that make up the most recent U.S. Congressional Districts

I am hoping someone can help me solve this or point me in a direction. I need to know what census blocks make up the most recent Congressional Districts (115th). I have found a file that the US Census ...
1
vote
1answer
37 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 ...
1
vote
1answer
30 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 ...
1
vote
1answer
24 views

Removing Overlapping Outlines Within a Single Feature Class

I have a polygon feature that is overlapping itself. Both of the polygons in the image below are from that same feature. I do not want to dissolve the boundaries, but I only want one of the outlines ...
1
vote
1answer
280 views

Google Maps City Boundary of Japan

When I see Japan area though Google maps, I see yellowish boundaries. It seems like places where many people are gathered. I see them in another countries in France I wonder what data are these and ...
1
vote
1answer
227 views

How to draw boundaries to separate clusters?

I have used the R Project for Statistical Computing to make a map of clusters based on latitude and longitude by using the k-mean clustering. Is there any software I can use to import the clusters ...
1
vote
1answer
96 views

Merged two polygons in QGIS, but can't get rid of old boundaries that remain inside it

I've merged two polygons in QGIS, but I've been unable to rid myself of the excess boundaries from the old polygons that continue to exist inside the new one. The only boundaries I would like to keep ...
1
vote
1answer
37 views

How to export a list of intersections of 2 datasets of boundries/polygons

I am using the following datasets: NYC Zip Codes: https://data.cityofnewyork.us/Business/Zip-Code-Boundaries/i8iw-xf4u NYC City Council Districts: https://data.cityofnewyork.us/City-Government/City-...
1
vote
1answer
88 views

Calculating national coastlines

I am very new to ArcGIS and have the following problem: I have a shapefile with around 1500 regions worldwide and want to calculate for each region the distance up to the coastline of its own country (...
1
vote
1answer
186 views

Unable to project GPM precipitation data correctly in QGIS?

After downloading the GPM (Global Precipitation Measurement) data from FTP, I tried opening the image in QGIS and I get a popup message saying CRS was undefined. As I know the projection is set to ...
1
vote
1answer
417 views

what is the Parcel (APN) in this data block?

I am trying to figure out the 'pattern' to obtain APN to polygon mapping of parcel in datasets...so my code can query by "APN" for a polygon. APN as in: https://en.wikipedia.org/wiki/...
1
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0answers
13 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 ...
1
vote
1answer
20 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 ...
1
vote
1answer
27 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:...
1
vote
1answer
32 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 ...
1
vote
0answers
36 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 ...
1
vote
1answer
87 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 ...
1
vote
0answers
360 views

Getting boundary coordinates from given lat,long and radius [closed]

I have: lat-long : (41.8719 , 12.5674 ) Radius: 50 meters I want all the boundary coordinates from that given point. I would like some scala code for this.
1
vote
1answer
2k views

Get bounds of featureGroup with multiple features

I tried looking into a solution for this myself, or an alternative way to load my layers, but I'm simply unable to. I first load a geoJSON file through L.GeoJSON.AJAX(), then add the features (...