Top "Gis" questions

A Geographic Information System (GIS) captures, stores, analyzes, manages, and presents data that are linked to location(s). The GIS Stack Exchange should be considered for questions with this tag.

Calculating area enclosed by arbitrary polygon on Earth's surface

Say I have an arbitrary set of latitude and longitude pairs representing points on some simple, closed curve. In Cartesian …

math geometry gis geography
Where can I download a list of world cities and towns by ISO 3166-2 state code?

World countries and their standard codes are listed in ISO 3166-1. States (whatever are they called in different countries ("lands" …

internationalization geolocation gis registration city
How to use Google Maps API in leaflet-cloudmade

Is there any way to integrate Google Maps with leaflet-cloudmade? I mean, I don't want to use the original cloudmade …

google-maps gis leaflet
Leaflet.draw mapping: How to initiate the draw function without toolbar?

For anyone experienced with leaflet or leaflet.draw plugin: I want to initiate drawing a polygon without using the toolbar …

javascript leaflet gis leaflet.draw
Country name for GPS coordinates

Is there an easy way to get the name of the country on whose territory a given point is located? …

geolocation gis reverse-geocoding
How do I convert a latitude/longitude pair into a PostGIS geography type?

I'm trying to load a bunch of latitude/longitude pairs into a PostGIS geography type so as to be able …

database postgresql gis postgis
Fast Haversine Approximation (Python/Pandas)

Each row in a Pandas dataframe contains lat/lng coordinates of 2 points. Using the Python code below, calculating the distances …

python numpy pandas gis haversine
Random geographic coordinates (on land, avoid ocean)

Any clever ideas on how to generate random coordinates (latitude / longitude) of places on Earth? Latitude / Longitude. Precision to 5 points …

java gis geocoding
Layer Ordering in leaflet.js

How can I force a new layer added to the map in Leaflet to be the first over the basemap? …

gis leaflet
Checking if a longitude/latitude coordinate resides inside a complex polygon in an embedded device?

I need the user to be able to draw a complex polygon on a map and then have the application …

algorithm math embedded geometry gis