Tag: gis

204 Fastest Way to Find Distance Between Two Lat/Long Points 2009-06-17T12:22:41.247

108 Preferred order of writing latitude & longitude tuples 2011-09-05T13:57:17.010

70 Difference between GeoJSON and TopoJSON 2013-02-06T23:14:07.800

64 Convert a shapefile (.shp) to xml/json 2010-02-08T18:42:48.937

63 GIS: PostGIS/PostgreSQL vs. MySql vs. SQL Server? 2010-09-18T21:44:53.973

60 Best way to overlay an ESRI shapefile on google maps? 2011-03-22T05:03:47.333

59 Is there an efficient algorithm to generate a 2D concave hull? 2008-09-17T14:04:45.880

50 Loading a local .kml file using google maps? 2010-08-18T17:22:27.333

50 Get lat/long given current point, distance and bearing 2011-08-28T16:56:14.227

49 How to intelligently degrade or smooth GIS data (simplifying polygons)? 2009-12-04T21:59:44.990

48 Determine timezone from latitude/longitude without using web services like Geonames.org 2011-04-07T16:45:16.557

37 NoSQL and spatial data 2010-01-11T11:57:45.873

37 Google maps: place number in marker? 2010-05-23T04:24:56.183

35 Get altitude by longitude and latitude in Android 2010-01-03T19:30:26.113

34 How do you know what SRID to use for a shp file? 2009-10-09T00:00:25.677

33 Survey of GIS Programming 2008-11-19T20:22:32.397

33 Simplified (or smooth) polygons that contain the original detailed polygon 2011-02-18T04:24:08.810

31 How do I convert a latitude/longitude pair into a PostGIS geography type? 2010-03-26T13:31:59.920

30 Calculate distance between Zip Codes... AND users. 2010-10-21T00:13:03.663

30 Can R be used for GIS? 2011-04-22T15:36:28.487

28 Random geographic coordinates (on land, avoid ocean) 2012-02-01T23:21:20.787

28 Leaflet.draw mapping: How to initiate the draw function without toolbar? 2013-04-02T21:51:51.797

27 Where can I get postal codes for all countries? 2008-11-21T06:10:18.917

27 How to Convert data frame to spatial coordinates 2015-04-19T22:21:35.977

26 Rasterizing a GDAL layer 2010-02-08T10:06:43.427

26 Smoothing arcs/plot points in D3.js/GeoJSON/TopoJSON/Shapefile (somewhere along the way) 2015-04-01T13:43:34.840

25 How do I find the lat/long that is x km north of a given lat/long? 2009-07-14T12:46:24.460

25 How to calculate distance from a point to a line segment, on a sphere? 2009-08-19T12:19:49.207

25 Point in Polygon with geoJSON in Python 2013-12-25T19:44:17.260

24 How to convert from UTM to LatLng in python or Javascript 2008-12-05T13:42:34.977

24 C# implementation of Google's 'Encoded Polyline Algorithm' 2010-10-04T01:14:52.610

24 Spatial data with mongodb or cassandra 2011-10-26T13:59:09.650

24 Error: isTRUE(gpclibPermitStatus()) is not TRUE 2015-06-11T19:44:46.070

23 sp::over() for point in polygon analysis 2013-09-25T10:43:51.250

22 Get street address at lat/long pair 2008-10-01T16:38:55.903

22 How to use Google Maps API in leaflet-cloudmade 2012-06-17T05:15:47.597

22 Finding adjacent polygons in R (neighbors) 2014-10-22T01:26:15.140

22 Fast Haversine Approximation (Python/Pandas) 2015-04-09T18:00:08.417

20 What is the quickest way to find the shortest cartesian distance between two polygons 2008-09-17T14:48:13.980

20 Algorithm for finding nearby points? 2009-05-08T05:20:01.283

20 Calculating area enclosed by arbitrary polygon on Earth's surface 2009-08-27T10:36:16.593

20 Good examples of MapServer / OpenLayers 2010-04-27T17:02:05.427

20 Layer Ordering in leaflet.js 2012-10-11T21:30:33.367

20 WorldWind line of sight 2015-02-21T21:29:50.130

19 Map Routing, a la Google Maps? 2008-08-05T20:24:42.960

19 Shapefile reader in Python? 2010-12-05T05:36:15.857

18 Country name for GPS coordinates 2010-09-03T06:33:59.787

18 How to identify Leaflet's Marker during a `popupopen` event? 2012-10-03T02:46:17.580

18 Failed to resolve common open file gradle.build 2018-06-10T17:28:53.867

17 How do I find the center of a number of geographic points? 2008-09-24T16:56:45.803

17 Does PostgreSQL implement Geospatial relationship queries? 2009-03-24T11:55:24.827

17 Guidelines for GIS application development 2009-06-28T07:44:17.517

17 Find path by sea from coastal point A to coastal point B 2011-11-14T10:59:14.753

17 sql geography to dbgeography? 2013-02-27T09:05:26.297

17 GeoJSON and MongoDB: Is it worth it to store points as GeoJSON.Point? 2013-04-21T07:19:33.723

17 How to find intersecting geographies between two tables recursively 2017-01-27T17:19:20.917

16 Heightmap generation algorithm? 2009-02-17T15:56:37.923

16 Where can I find the coordinates needed to draw the US in the Mercator projection? 2010-02-19T18:49:58.060

16 django.contrib.gis.db.backends.postgis vs django.db.backends.postgresql_psycopg2 2011-08-31T03:51:29.933

16 Distance between 2 POINTs in Postgis in srid 4326 in metres 2011-12-11T14:24:22.830

16 is Boost.Geometry mature enough? 2012-03-27T14:17:28.980

16 How can I handle an "orphaned hole" in a polygon shapefile in R or ArcGIS? 2012-07-11T12:51:09.770

16 Checking if a longitude/latitude coordinate resides inside a complex polygon in an embedded device? 2012-12-19T10:17:36.577

16 Converting geo coordinates from degree to decimal 2013-01-18T17:45:22.683

16 Facet with free scales but keep aspect ratio fixed 2013-04-27T23:52:03.287

16 Google Maps and SQL Server LINESTRING length inconsistent 2015-05-29T17:48:41.117

15 Retrieving population density data 2010-08-18T22:03:04.120

15 Calculation of accumulation area 2011-04-26T11:55:13.533

15 Distance from Lat/Lng point to Minor Arc segment 2015-09-24T21:46:25.757

14 Is there a GIS "Hello World" Equivalent? 2009-01-09T19:30:12.970

14 See if lat / long falls within a polygon using mysql 2009-07-03T08:34:29.750

14 Geographic obstructions in radius searches 2011-01-10T05:12:31.403

14 Scaling marker size with marker icons from a sprite in Google Maps API v3 2011-07-25T02:36:48.683

14 ST_DWithin takes parameter as degree , not meters , why? 2011-12-09T11:23:22.417

14 How to read / write geography data using C#, Entity Framework and SQL Server 2008? 2012-05-18T15:54:01.693

14 "No Disk" error using GDAL from C#/.NET 2012-07-14T21:05:25.793

14 Matplotlib imshow offset to match axis? 2012-09-07T19:22:47.280

14 Dissolve holes in polygon in R 2012-09-30T17:15:05.483

14 Python, GEOS and Shapely on Windows 64 2012-10-30T17:05:23.853

14 Where can I download a list of world cities and towns by ISO 3166-2 state code? 2014-07-18T15:01:47.750

13 Designing a WPF map control 2008-09-17T19:16:29.733

13 Where do you get ArcGIS development questions answered? 2009-11-19T19:18:01.200

13 GIS spatial functions in PHP? 2009-12-21T12:26:30.617

13 Adding vector map data to iOS GPS app. Real Time vector graphics rendering 2011-01-07T04:11:55.767

13 Difference between multipolygon and polygon in PostGIS 2012-12-31T07:27:43.977

13 Plot circle with a certain radius around point on a map in ggplot2 2015-12-09T15:47:19.890

12 C# WPF resolution independancy? 2008-11-18T23:43:50.290

12 Finding Cities within 'X' Kilometers (or Miles) 2009-04-30T20:43:13.720

12 Does anyone know of any good open source Geodjango apps to dig through? 2009-07-06T16:19:37.597

12 How to look up elevation data by lat/lng 2009-07-07T05:36:50.847

12 insert variable values into a string in python 2010-07-29T21:57:37.117

12 GeoDjango: How to create a circle based on point and radius 2011-02-13T16:09:27.250

12 How do I convert kilometres to degrees in Geodjango/GEOS? 2011-03-07T08:18:38.393

12 Find all coordinates within a circle in geographic data in python 2011-06-16T11:37:04.243

12 Color states with Python's matplotlib/basemap 2011-09-28T16:23:41.953

12 Georeferenced subgraphs / clusters with Graphviz 2011-10-03T17:49:12.263

12 Identify a linear feature on a raster map and return a linear shape object using R 2012-03-07T02:45:21.743

12 How to project and resample a grid to match another grid with GDAL python? 2012-05-04T18:34:32.437

12 R: creating a map of selected Canadian provinces and U.S. states 2012-05-26T03:45:37.640