All Questions
19 questions
0
votes
2
answers
129
views
Identify outer wall of the floorplan or building [closed]
For the floor plan of the building with 2 rooms (it can have more as well)
Is there Python or Java library which I can use to identify outer-wall (facade) of the building as polygon (a closed shape ...
- 111
0
votes
0
answers
137
views
A minimalistic Python\Java library for HOSTING WMS content
Colleagues of mine have developed an algorithm that, given a bunch of parameters, outputs a colormap. The initial version was integrated as a QGIS plugin. However now we need to create an ArcGIS ...
- 171
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
2
votes
1
answer
5k
views
How to convert GeoJSON to GeoTIFF
I'm looking for a way to convert a GeoJSON file to a GeoTIFF (georeferenced image) in Python or Java.
The inverse is possible using rasterio
- 125
0
votes
1
answer
294
views
How to get the the GPS coordinates corresponding to Cartesian pixel coordinates when drawing a PNG image from a GeoJSON file
I'm going to explain my problem. I've a classic GeoJSON file:
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
&...
- 125
1
vote
1
answer
1k
views
Create GeoTIFF images from TIFF image using the coordinates of the four corners
I have several TIFF images which were taken from an aircraft. The images are tilted. Hence, the orientation of the images are not in parallel to the grid system.
Please do refer to the below image:
(...
- 151
0
votes
0
answers
1k
views
How convert OSM relation to GeoJSON -based all kind of relation member roles
I just want to convert OSM data to GeoJSON where it is pretty simple with node and way tags of OSM data, but relation which is giving complex can't find the logic to convert OSM relation to GeoJSON ...
1
vote
1
answer
779
views
Quadtree based polygon indexing? (Python/Java)
I was wondering how to best represent the inside of any given polygon (GeoJSON coordinates) with some sort of indexing, like a grid or quadtree? See image below for an approximation of what I have in ...
- 11
1
vote
1
answer
827
views
Merge two WKT Linestrings (almost parallel) into one
I don't have tools like ArcGIS. I have two LINESTRINGs
LINESTRING(121.5160996 25.0358556,121.5168148 25.0347768,121.5170452 25.0345573)
LINESTRING(121.517053 25.0345682,121.516851 25.0347814,121....
- 141
1
vote
1
answer
2k
views
How to calculate cell tower polygon and get the coordinates in wkt format
I have an use-case where I have to calculate the polygon of cell tower and store the polygon information in wkt format. I have got the following information regarding a cell tower.
latitude
longitude
...
- 121
3
votes
2
answers
5k
views
Find a linestring closest to a given linestring
There must be already a solution to this problem - let's say we have five different linestrings. They might intersect or not. Given a sixth linestring, how do we find which one of the original five ...
- 259
2
votes
1
answer
2k
views
Given a collection of polygons, how do you find which one contains a given point? Java or Python
I'm looking for Java or Python libraries that will help me answer this question efficiently: given a collection of polygons (via shape files or GeoJSON), which one of them contains a given point? The ...
- 203
3
votes
3
answers
4k
views
library to create static maps (an image) with custom map features
Do you know if there is a small library (preferably in python or java) around that allows the creation of static maps? Something where you can specific the URL of your TMS server, width and height in ...
- 319
-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
1
vote
2
answers
6k
views
Getting time dimension from GRIB file?
I have a GRIB file from NOAA that contains several variables for a specific subregion in Norht-East Atlantic.
I'm using ECMWF grip-api Python library to parse the file. While I'm able to get the ...
- 125