All Questions
11 questions
1
vote
0
answers
299
views
How to calculate the daylight saving time given a latitude and longitude [closed]
I've been using an algorithm (https://gist.github.com/assaflavi/fc8cf83c167558ebf3ab159b5c5b0df2) to calculate sunrise and sunset times given a latitude and longitude and it works fine but this ...
- 11
-1
votes
1
answer
2k
views
GeoJSON custom marker for different data sources
I need help how to show markers with two different colors for two different GeoJSON data sources.
Here's first source geojson.php:
{
"type": "FeatureCollection",
"...
- 3
1
vote
1
answer
319
views
Choosing a platform for developing opensource GIS web application.
I am from a non programming background. I started learning GIS opensource web applications from last 3 moths. Now I am using only notepad++ for writing codes and I am familiar with javascript, HTML ...
- 55
-2
votes
1
answer
308
views
What application server or web framwork to use [closed]
I'm looking to make a webmapping app, which gonna use Geoserver as carto server, and Postgres/postgis as Dabatase, and Extjs as client UI.
but i'm in dilemma in application server side, between PHP, ...
- 4,614
2
votes
1
answer
1k
views
Point to Line Calculations
We are looking to take a point and compare it against the nearest point to an adjacent line. All values are in lat/long.
We tried using some of the concept found on the board but found it did not ...
- 23
0
votes
2
answers
1k
views
Extracting common outline of multiple polygons with code [closed]
I'm not really asking for a chunk of code to do this, but more of an algorithm I can work with myself.
For example, this is the state of Maine, obviously, and I have the points of each county stored ...
- 169
0
votes
2
answers
879
views
storing images in mysql from WebGIS applications
I'm a complete amateur at writing code. I would like to make an application for storing LNG, lat, and other data, as well as images in mysql. I've set up, I made a separate application for storing ...
- 1
0
votes
3
answers
1k
views
REST backend framework for routing?
I'm looking for a framework in Java or PHP to use it as backend for a mobile application. It should (if possible) implement REST services, geo functions for routing and CRUD services.
I found the ...
- 51
1
vote
1
answer
2k
views
Display Shapefile on website (Java or PHP)
i have to write an application where similar to Google Maps where i have to display a shapefile in a web application. My available technologies are Java (frontend framework: Apache Wicket) or PHP. It ...
- 111
4
votes
4
answers
2k
views
What software would be useful to create General Transit Feed Specification (GTFS)? [closed]
I am doing a project in which i am required to create GTFS. I look at transit google developer forum which provide a format to create feed but that completely have to done by hand (we have to write ...
- 405
6
votes
0
answers
381
views
What is the structure of Standard Interchange Format (SIF) used by spatial data providers?
What is the structure of Standard Interchange Format(SIF) used by navteq and other spatial data providers? Any documentation/sample files? Is there a SIF parser available in C/C++/Java/PHP ?
- 61