Questions tagged [django]

Django is a high-level Python Web framework

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WinError 193 %1 is not a valid win32 application. Django 2.05 python 3.6.2

I will post the error below. I did the main django tuturoials on the website without a problem. But something happens when I change my ENGINE in settings.py to the postgis version. This is the ...
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0answers
280 views

How to get points within boundaries which overlaps the anti meridian

Within my application I have a map and I'm showing markers on the map which represent objects that I get from the database. The objects have latitude and longitude. The objects are selected only if ...
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1answer
995 views

django leaflet custom popups

I use some django project with PostGIS for database and leaflet map. I have add simple leaflet popups like this : and here the snippet code to call popups : onEachFeature:function (feature,layer) { ...
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1answer
997 views

Use of Leaflet to display raster layers in Django [closed]

I'm using Django to create a webserver that can gather user inputs, produce simulations and output the results with Leaflet. So far I can produce simulations in Farsite using prepared inputs, however ...
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1answer
92 views

Python 2.7.12 not compatible with Django but still cannot be updated

I have installed Python 3.6.4 on my computer. I am trying to set up Django but each time I try to use the command prompt, it tells me that the Python version am using is not compatible. When I check ...
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251 views

Tilecache and python (TMS)

I'm working on a Django tile solution to serve thousands of images. So far I have been able to set a Mapscript server with tilecache. Everything seems ok but when loading into Leaflet I got some kind ...
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0answers
440 views

Django app can't upload multi-band-image

I try to upload a TIFF raster image with 5 bands in Django app and I get error message in form : Upload a valid image. The file you uploaded was either not an image or a corrupted image. I am sure ...
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0answers
348 views

Geodjango PostgreSQL/PostGIS database question

I have a simple django app using sqlite3. My app is simple I have django user authentication system where the user can be upload spatial raster images and can see that images in user personal HTML ...
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1answer
496 views

Connecting Django to postgresql

I plan on building a web application using Geodjango. After installing PostgreSQL, PostGIS, OsGeo4W and psycopg. I changed my settings.py db to that of the PostGIS. Each time I run the commmad "python ...
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0answers
270 views

NetworkX read_shp works on Python 2.7 but not on Python 3?

I was trying to implement the same code in Python 2.7 and Python 3.0 opening the same file from the same directory using NetworkX's read_shp function. One, using Python 2.7 IDE and the other is ...
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112 views

Raster calculator using django

I want to create a web application that takes in 5 images does some calculation and shows the result on a basemap. all these images would be on geotif format single band and with values on pixels, I ...
4
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1answer
1k views

Unable to display geojson data on a leaflet map in a Django app

I'm developing a Django application using Django-leaflet and Postgresql / PostGIS. I retrieve the data in views.py and I convert them in GeoJSON format using Django's serializer. My views.py: from ...
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1answer
384 views

Get random point from django PolygonField [closed]

TL,DR; I want to get a random point from a polygon (potentially) using ST_GeneratePoints. Background I'm making a GeoDjango webservice and have a collection of UK Postcodes with respective ...
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0answers
863 views

Uncaught TypeError: a.addEventListener is not a function When using React OpenLayers Wrapper

I am trying to create a web app using a Django back end with React for the front end. I am using a React OpenLayers wrapper on the OpenLayers site and keep getting the Type Error. Can someone please ...
3
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1answer
123 views

Django map permissions

I want to build a site using Django and have a user authentication system. In that site I want to serve maps and other data, but not to all users. What I am interested in is: can I give the maps some ...
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2answers
409 views

Issue with GEOS not creating buffer correctly for use in Django

Currently in my django I use the following function to take a point, buffer it by 2000 meters, and produce a circle polygon: updatequery = str("update table_events set event_geo = ST_Multi( ...
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0answers
393 views

How to use pgRouting together with Django?

I am using pgRouting together with QGIS. Now I want to convert everything into a web-solution. I decided to use Django for that. Creating the data-model and receiving geographical data from the ...
8
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1answer
3k views

Splitting Polygon by Linestring in GeoDjango?

In am a Django developer with limited GIS knowledge. In Django I have a polygon and a linestring as follows: I would like to split the polygon by the linestring to obtain the 4 resulting polygons (or ...
1
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1answer
256 views

Styling Vector layer with OpenLayers

I'm using Django and Openlayers to add some data from my PostGIS database to the map but can't seem to work out how to style the vector layer that uses the kml. var layer = new ol.layer.Vector({ ...
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2answers
2k views

Getting list of all countries using Overpass API?

I'm a developer that's trying to build a django application and trying to incorporate the Overpass API to it. I'm new to the API and OpenStreetMap (and GIS in general), so I thought I would start off ...
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0answers
257 views

How to display geojson data on browser from mongodb using mongoengine and django rest api

I have stored my geojson data on mongodb. which contains properties and polygon of a area. { "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": { "Year": 2015,...
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0answers
309 views

GeoDjango: GDAL library is not available to transform() geometry

I am trying to take points and buffer them to create polygons in my django project. I queried for points and tried to take the geometry of the first point and transform it to a meters based system (...
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2answers
189 views

I wish to find sites within a distance of a route, using django GEOS filters, by converting a route to a polygon to test model instances within

Python 2.7.12 (default, Jul 1 2016, 15:12:24) [GCC 5.4.0 20160609] Django (1, 7, 11, 'final', 0) Postgres [u'PostgreSQL 9.5.5 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 5.4.0-6ubuntu1~16....
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1answer
805 views

Creating a lineString from another model that has pointField

I'm a beginner in GIS developing and this might be a simple question. I'm using Python Django equipped with GeoDjango. Where I use Django-leaflet and database PostGreSQL with PostGIS. I already have ...
0
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1answer
895 views

GeoDjango - faster way to use polygon.crosses?

I have a polygon and a line segment. I want to know if the line segment is both inside and outsize the polygon. Using "prepared" has helped but it's still no where near fast enough. how can i speed ...
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1answer
221 views

Geonode custom development

There is not much information in the form of documentation on http://geonode.org/ development. I need to do some custom "App" development for geonode so that my users can have more functionality ...
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0answers
432 views

Django and Osgeo (closed)

I want to use osgeo tools in a virtualenv with Django. I already followed the directions in the Django manual succesfully on different linux systems. But this time I got stuck while intalling GDAL. ...
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0answers
2k views

Django/PostGIS: How to insert coordinates in PointField in EPSG:27700, and return EPSG:4236?

I am using Django 1.9 with PostGIS. I have input data that consists of British National Grid eastings and northings, and a table that looks like this: class Org(models.Model): name = models....
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1answer
3k views

GeoDjango, distance filter based on database column

I have a geodjango model with fields coverage = 10 * 1609.344 reference_point = Point(-72,45) #or some other lat lng class ServiceArea (geo_models.Model): center = geo_models.PointField(default=...
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1answer
1k views

How to display shape files stored in a database into a web page

I'm pretty new to geodjango and python in general. But I would like to display my shapefiles stored in my database into a web pages and present them in layers and retrieve certain information if a ...
14
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2answers
24k views

How to calculate the bounding box of a geojson object using python or javascript?

I have django app with leaflet on the frontend and I need to calculate the bbox of a geojson object so that I can pass the coordinates to map.fitBounds() I have tried some libs as well as trying the ...
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1answer
133 views

Is there a way to use raw html with the markdown used in odyssey.js?

I use odyssey.js in part of my Django site. The map part of it is all working fine but I need to add some <i-frame> elements. I'm not sure what flavour of markdown it is and can't figure out how ...
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0answers
436 views

show polygon from database in browser in geodjango

I tried to retrieve the polygon which I saved into postgis database. (all polygons) Here is my code: models.py from django.contrib.gis.db import models class MyMap(models.Model): name = models....
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0answers
1k views

How do I set up a PostgreSQL database for use with PostGIS and GeoDjango?

The Django docs say to use createdb -T template_postgis geodjango but I already have a database set up. While trying to find out what this actually does and a way to apply it to an existing database, ...
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0answers
60 views

Error in Load module in Geodjango

I am following this tutorial https://docs.djangoproject.com/en/1.8/ref/contrib/gis/tutorial/ and did layer mapping. And going along with documentation, I tried the below code from world import load ...
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1answer
1k views

ImportError: cannot import name GEOSGeometry Django 1.7

I am a heroku newbie and I keep getting the said error whenever I try to sync db on heroku. I am using a hobby Dev instance which from this link shows that their is no support for PostGIS on the free ...
2
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1answer
858 views

Creating geodjango model with geometry field that can accept different projections

I am working on web application with GeoDjango and within the model (db table) RoadAxis I have geometry field or more precisely LineStringField where I need to store different polylines (road axis) ...
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0answers
337 views

How to customize and add additional features in GeoNode [closed]

I need some advice on how to start customizing my GeoNode installation. I tried reading up on GeoNode documentations on how to do it but it always boils down to customizing or adding to the Django ...
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0answers
1k views

Import KML file into GeoDjango

I'm trying to import a KML file into an existing GeoDjango app (using a Postgres 9.3 database). This is my Django model: class PCT(models.Model): code = models.CharField(max_length=3, primary_key=...
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1answer
2k views

Unable to create Polygon using Geodjango admin interface

I am new to GeoDjango. I have created Admin interface for my Model. It loads correctly. I am also able to draw the Polygon on map(At client side) but when I save It tells me Invalid input and throws ...
2
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1answer
4k views

Is MongoDB more suitable than PostGIS as backend for geo-enabled Django website? [closed]

I am trying to select a backend for a geo enabled website written in Django. Is MongoDB an easy possibility or stick with PostGIS? What are the key considerations to choose one or the other if ...
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2answers
5k views

Python library or algorithm to generate arc geometry from three coordinate pairs?

I'm trying to write code to generate fixtures for a django/geodjango project. I need to generate geometry for arcs (line string) given three lat/long pairs; start of arc, end of arc and centre of arc. ...
4
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1answer
10k views

GeoDjango Admin: Adding PointField latitude and longitude to other fields

I've been redesigning my application to allow users to set markers more easily. One thing I need to include for backwards compatibility purposes is that the new model must have a latitude and ...
1
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2answers
825 views

Data structure: mongoengine to GeoJson

I recently posted my first question on StackOverflow, but I think the question was quite extensive and full of potential errors. So I'd begin again, step-by-step, with a much shorter and simplier ...
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2answers
1k views

Distance between Paris and San Francisco with PostGis (out of range coordinates?)

SELECT ST_Distance(gg1, gg2) As spheroid_dist, ST_Distance(gg1, gg2, false) As sphere_dist FROM (SELECT ST_GeographyFromText('SRID=4326;POINT(37 -122)') As gg1, ST_GeographyFromText('SRID=4326;...
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0answers
553 views

GeoDjango with MongoDB

Has anyone had experience successfully deploying GeoDjango with MongoDB? Is it possible? If so, how is it as simple as as installing the non-relational fork of Django and setting MongoDB as the ...
1
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1answer
811 views

Load partial shapefile into Postgis / GeoDjango project

I have a shapefile with Canadian postal codes, but am only looking to load a small subset of the data. I can load the entire data file and use SQL or Django queries to prune the data, but the load ...
3
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0answers
326 views

What is a good way to retrieve geographic data along with images and mp3 files?

I'm working in the Django backend of an audio guide for tourism with mobile devices. Basically, the client (Phonegap app for Android and iOS) can follow a route over a map (Leaflet client) and see ...
3
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2answers
2k views

How to debug third party JavaScript libraries such as openlayers?

I am able to work with web development tools like firebug and dev tools and solve bugs in my javascript files. But when it comes to bugs that produce errors such as "typeError: e is null" which ...

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