A part that forms the outer edge of something.

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13
votes
2answers
2k views

Where can I find historic country border data?

I am looking for border polygons from World War I (from 1914-1918). Is there a resource out there that maintains this kind of information?
7
votes
4answers
611 views

Where can I find state borders for Germany?

I'm looking for free state border layers for Germany. Are there any free sources for such data?
6
votes
2answers
170 views

Where can I find Historical GIS datasets?

I've been looking for a while for Historical GIS datasets. In a lot of places (also in answers here at StackExchange), people are referring to a great dataset at ThinkQuest, which contains shapefiles ...
4
votes
2answers
2k views

How to trim Landsat 5 scene edges

I have a bunch of Landsat 5 scenes that I want to mosaic together. However Landsat 5 scenes have a zigzag pattern on the left and right edges as well as some bad data values along these edges. Is ...
4
votes
2answers
412 views

Is there a source for historical shapefiles of Europe in the modern era?

Is there a source for historical shapefiles of Europe in the modern era, i.e. starting ca. 1400? I know that "where can I find historic border data" questions were asked multiple times but I couldn't ...
4
votes
1answer
114 views

How to visualize texture along borders of multipart polygon

I came across this map and would like to replicate the textured styling found along the borders. I'm starting with a multipart polygon but my process has perhaps too many steps. I'm using QGIS 2.8.2. ...
3
votes
7answers
15k views

Which US zipcodes map to more than one state or more than one city?

I'm using a zip code listing, and I am curious to know how many (or which) zip codes map to more than one US state or US city? For instance I know that 42223 resolves to the same city which straddles ...
3
votes
1answer
86 views

Maritime zones information?

What is that borders in the water on OpenStreetMap maps? Is this some of maritime zones? Is this "territorial waters", i.e. 12 nautical miles away from borders? What is between islands? Where/...
3
votes
1answer
364 views

Extracting border between contiguous polygons using ArcGIS for Desktop?

I have a shapefile with polygons representing unique populations. I want to determine contiguous polygons in my shapefile, and then extract the border separating contiguous polygons as a separate ...
3
votes
3answers
1k views

Extracting polygons along a border

I have a shapefile of United States counties. Suppose I am interested in all counties in Georgia that border North Carolina and all counties in North Carolina that border Georgia. And, in particular,...
3
votes
1answer
299 views

How to create a Color Ramp for Polygon Outlines in ArcGIS-Desktop?

Within the properties (symbology tab) of ArcGIS-Desktop (10.2.2, ArcEditor license level), is there a way to color the polygon outline of a layer using a color ramp? Using predefined color ramps ...
3
votes
0answers
132 views

Quantifying polyline overlap

I have a set of regions and would like to quantify the degree to which the boundary of these regions are situated on/near rivers. I have turned the regions from polygons to polylines in arcgis 10.1 ...
2
votes
2answers
71 views

How can I create a map of both Californias? [closed]

I want to create a map of "UniCalifornia" which would show the U.S. state of California and Baja California combined into "One California." The end result should be an image file that does not show ...
2
votes
4answers
477 views

How do I eliminate the black border on a georeferenced map layer?

I have geo-referenced several scanned maps. Theses are placed side by side on separate layers in QGIS. They overlay other older maps of the same areas. Georeferencing caused the maps to have black ...
2
votes
1answer
179 views

Calculating countries flown over on flight path

Say I have two airports given. I can then get their coordinates. Now that I have the beginning and end coordinates I can draw flight-path from the two locations. Now my question is that given two ...
2
votes
1answer
1k views

How to meassure the length of common edges between polygons?

I have a shapefile that contains several polygons which in fact represent the limits of several counties. My task is to find each length of each shared border. So in other words I want to know how ...
2
votes
1answer
506 views

How to overlay my interpolation within the boundaries of Quebec?

I am trying to create interpolated maps within geographical borders. I have the coordinates and values to the points I am trying to interpolate. I also have a map of the geographical land mass in ....
2
votes
1answer
112 views

Disable antialiasing in GeoServer .png output?

I would like to completely disable antialiasing of polygon borders in Geoserver's WMS png output. The reason is because we do downstream colour remapping, and intermediate colours break that. This is ...
2
votes
2answers
454 views

District border join in Google maps

I am developing a district editor for cities. The idea is that we divide the city into districts. I am using GoogleMaps, but any other js library is acceptible. Problem 1: districts are connected ...
2
votes
1answer
152 views

How to represent two fields of the same states or district layer using different color borders and fills in QGIS?

If I had a set of data in QGIS that was gradually shading a state or district the exact way I wanted -- but I also need to portray more information about that state or district with additional colors, ...
2
votes
0answers
80 views

How to change the order of a raster in order to create mosaic with MosaicPro (Erdas 9.2)?

Is there a way to reorder the input files so I can control which ones are on top of the others?
1
vote
1answer
103 views

Creating symbology for polygon layer which has opaque outlines but transparent colored fills using ArcGIS for Desktop?

I am working in ArcGIS 10.2 and I run a Basic license. Is there a way to make the outlines/borders of a polygon layer 0% transparent, while having the fields themselves show up at around 20% ...
1
vote
1answer
23 views

Wrong boundary when plotting Canada's shapefile in Python

I want to plot the Canadian shapefile with province boundaries highlighted and hollow filling. I have downloaded the shapefile from here. This is the script I use to visualize the shapefile: ...
1
vote
2answers
125 views

How to automatically extract borders from an old map?

I am new to QGIS and I am wondering whether there is a plugin which automatically recognises the borders on a map and converts the areas into polygons? Edit: I am using QGIS 2.14.1. It is a picture ...
1
vote
1answer
30 views

Conflicting boundary information

When I query, for example, the Germany Boundary Commission, and the Austrian Boundary Commission, for boundary information, I am getting conflicting data sets. Is there a resolution method for this?
1
vote
1answer
72 views

Hide only certain borders in QGIS?

I have shapefile (the 48MB just below the table here) showing borders of different levels in administrative hierarchies (e.g. borders within communities, between communities, and between federal ...
1
vote
2answers
81 views

Extract border polygon from a geometry

I am wondering if there is a way, algorithm, tools, to create, from a geometry, another one that is the border with a certain thickness. The idea is to get something similar to that : This looks ...
1
vote
1answer
76 views

Acquiring administrative country border data with a given resolution

I want to be able to find out which country a given (lat,long) pair falls into, but I don't need this to be extremely accurate and especially coasts can be quite crude as false positive hits will be ...
1
vote
1answer
64 views

Where can I find a dataset for international borders that includes national waters? [duplicate]

I'm trying to find a .shp file that not only includes international land boundaries, but also the water boundaries, extending out to international waters. Does such a thing exist? I'm not even sure ...
1
vote
1answer
55 views

Merged Layers turned into square shape cause by single layers in QGIS?

What I did is merged the 30 layers of the map (Isabela Map Province - Philippines) and below is what happened. How do i remove the inside map of the border? I'm new to QGIS and I'm using QGIS 2.4 ...
1
vote
2answers
53 views

Set border symbology by bordering feature?

I'm using a US state shapefile, and I want to have different border types based on properties specific to the border, not to any state. For example, I might want the Florida-Georgia border to be red,...
1
vote
1answer
816 views

matching a border of one polygon to another [duplicate]

I have a polygon (A) that I drew the eastern border of in QGIS. I have another polygon(B) whose western border I want to nest against the eastern border of polygon a so they are touching but not ...
1
vote
0answers
29 views

Offsetting polygon borders where they share border in QGIS?

Say you have 2 polygons with different coloured borders, where the borders are shared the colour is problematic. How do you offset/separate them in QGIS 2.10.1?
1
vote
0answers
21 views

Subdistrics border change over time

I have 4 shapefiles of India state from 4 decades, and I trying to identify changes within the sub-district level such as splits or merge of sub-dist, border changes etc. I am using R but I can use ...
1
vote
0answers
101 views

How to calculate which US counties border the ocean?

I have a shapefile with boundaries of US counties. I want to figure out one seemingly simple thing - which counties are on the Atlantic ocean? NOAA maintains a list of coastal counties, but this ...
1
vote
0answers
49 views

Lining up three Layers that use same Coordinate Reference System (CRS) in QGIS?

How do you make all borders of a layer equal? they should be equal but i don't know how, mCRS layer is all in philippine zone 5(EPSG:3125), with the same formula/equation, I'm new to QGIS and I'm ...
1
vote
2answers
88 views

How to create thinner outside boundary outlines with bolder interior lines [closed]

I am working with a shapefile with a jagged coastline and interior regional boundaries. I am trying to create a thin line for the coast, so it appears more clearly, while still keeping bold, thicker ...
0
votes
1answer
166 views

Dataset on bordering countries

Is there a publicly available dataset somewhere that lists all country-adjacencies (pairs of countries that share a land border)? Background: I want to programmatically access the list of countries ...
0
votes
1answer
94 views

how to select parts of a shape in QGIS

I have to have a Shapefile of France of the bigger regions: Ile-de-France, Bretagne, etc. and that is already included in my shape. But its only shown the Arrondissements (smaller regions) in France ...
0
votes
1answer
39 views

Visualizing road line segments within specific borders

I have a perhaps very simple ArcGIS question: How can I make the road line segments start or stop at the edge of the city's Census Block Groups?
0
votes
1answer
239 views

OpenLayers/Leaflet render world borders

I am trying to show all world borders. Either using OpenLayers or Leaflet. World borders are taken from here. This code does not work. What I am doing wrong? var Map = { map: null, layer: null, ...
0
votes
0answers
54 views

How to choose with a different way the OSM Boundaries

Hi i need to get the borders of a country via Overpass API, but with the following query relation ["boundary"="administrative"] ["admin_level"="2"] ["name:en"="some country for example Papua ...
0
votes
0answers
48 views

Free datasets of Europe's historical country borders since the Middle Ages [duplicate]

Is there a source for historical shapefiles of Europe since the Middle Ages? There was a promising answer to the similar question Is there a source for historical shapefiles of Europe in the modern ...
0
votes
3answers
221 views

find border coordinates of brazilian states

I am looking for coordinates (longitude and latitude) of each state of Brazil. Where can I find that? I have found a file for the US states here: http://econym.org.uk/gmap/states.xml, I am now ...
0
votes
0answers
27 views

Using r.neighbors on borders

I have a raster file with pixel size 30 x 30. At the upper border there is half row with "no data" pixels. I want to use the mode function to replace them. I have only thought r.neighbors (from grass) ...
0
votes
0answers
39 views

draw borders on an online map

I would like to split areas on a map of north germany between four community centers to split the responsibility for the whole map between these 4 areas. Is there an online tool where I can draw the ...
0
votes
1answer
27 views

Historic (and current) borders of Miami, FL

I am working from Australia and am new to US mapping and Census data. I am looking for historic boundaries of Miami (FL) from maybe 100-200 years ago. Also current boundaries would be great - what ...
0
votes
1answer
109 views

How to deal with political boundaries in grid cell analysis?

I have point data for Africa and I want to aggregate these data to grid cells which I create by a fishnet. Some grid cells cover parts of 2 or 3 countries. Normally, such cells are by different ...
0
votes
2answers
82 views

How to remove small areas without reducing borders

I'm having a problem where I am overlaying two maps to create a new kind of map with the data conjoined. In general this is good, but I need to remove the smaller areas from it. For the interior ...
0
votes
1answer
968 views

qgis — style edges of layer shapefiles to have thicker borders

I have two layers I'm working with here, both of North Carolina. One is "townships" the other is "counties". I want the counties shapes to have thick edges with no fill-in color. I couldn't find ...