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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50 views

Clip inside of GeoTiff using shapefile in QGIS

I'm looking to distract the red figures from the background imagery in the attached image. Normally i would use the clipper command in QGIS, but this only works if i only want to have the red figures ...
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2answers
243 views

Looking for world maritime boundaries in Geojson

I would like to use leaflet in order to display the world maritime boundaries (12 nm and 24 nm). Is there a reliable geojson source that I could use? If no geojson data is available, I am ready to use ...
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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 ...
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0answers
332 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(...
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0answers
92 views

OSM only label internal boundaries with Carto and Mapnik

Using the OSM workflow on switch2osm.org, we want to label all internal country boundaries but not external ones (coastlines). There are 3 ways we could think of: Is there any way to not show ...
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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 ...
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1answer
136 views

Finding four states each of six pairs of which have common boundary using PostGIS?

A Mathematics SE question on common boundary points of connected sets inspires this one. Construing the word "state" broadly (so that, for example, each province or territory of Canada is a "state") ...
3
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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.
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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 ...
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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 ...
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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; ...
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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-...
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1answer
44 views

Create average boundary between raster classes

I have a raster with multiple fields in it representing glaciers. As the boundary between land and ice is not often strict, there are little ice fields outside the end of the glacier. I do a raster ...
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1answer
1k views

How to display international boundaries in a OpenLayers map?

I'm interested in displaying only the boundaries, coastlines and between countries, of the world through OSM. I'm a bit lost and I don't know what I should do. I'm trying to display the OSM through ...
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0answers
27 views

generate a polygon that only keep its outside boundary [duplicate]

I have 25 different polygons as show in fig. below. These small polygons can form a bigger polygon without overlaps. My goal is, according the data of 25 smaller polygons, to generate the bigger ...
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1answer
442 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 ...
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3answers
627 views

What are the state border outlines called which treat every state as a single entity, including surrounding waters?

What are the state border outlines called which treat every state as a single entity, including surrounding waters? I need to create a latitude/longitude pairing of each state's "borders", which I ...
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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 ...
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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 ...
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1answer
495 views

Extract mean values of climate variables by level 2 administrative area country by country using R?

[Working with R version 3.2.2 in a Mac computer.] I am trying to calculate mean values for climatic variables (http://www.worldclim.org/) for spatial objects in R. The challenge is that I'm trying to ...
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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 (...
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0answers
373 views

Simplifying boundaries of divisions of country using QGIS?

I am trying to create a map to show all the divisions of a country (regions, departments), but the original map (one SHP file), with a lot of detail in the boundaries, is 5-Mb sized. I'd like to ...
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1answer
288 views

Polygon gap filling

I am working in ArcGIS and I have an urban center boundary, generated by a population-grid dataset. However, I want to fill in the gaps inside the urban center boundary (see the image below areas ...
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0answers
51 views

Urban Center Boundary

I want to create an urban center boundary (in ArcGIS v10.3) by using a population-grid dataset. So, I selected high density cells, that is to say cells with population over 1.500 and hereupon I want ...
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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 ...
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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 ...
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1answer
47 views

Count polygons crossed by other polygons using ArcGIS for Desktop?

I have two polygon feature classes, census blocks and voting precincts. What I want to get is the count of census blocks that contain more than one voting precinct, that is, where precinct boundaries ...
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1answer
81 views

How to find boundary data for cities in Utah

I'm working on a brand new project where I need boundary data for various cities in Utah. Salt Lake City was easy since their data is available for public download. The other cities? Not so much. ...
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1answer
414 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/...
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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 ...
6
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1answer
965 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 ...
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0answers
987 views

European postal code shapes provider

I am looking for a single (paid) provider of postal (zip) code shapes (boundaries) for countries in Europe. I hope to find reliable partner with reasonable pricing and update policy. What I need are ...
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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 ...
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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 ...
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3answers
125 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 (...
4
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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 ...