Questions tagged [geodjango]
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.
284
questions
0
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0answers
27 views
Deploying a GeoDjango project with Apache web server (on Windows system)
I am a newby in deploying web application. I have done a little web-gis app using Django in PyCharm and utilizing Osgeo libraries and drivers with Python37.
I have deployed the web server using ...
1
vote
0answers
17 views
Saving TIFF file in database with GeoDjango
I am trying to save a TIFF file in database with GeoDjango, but I get weird errors at dem.save().
Versions:
Python: 3.7
PostgreSQL: 11
Django 3.0.2
django.contrib.gis.gdal.gdal_version(): 2.4.0
...
0
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0answers
18 views
Django admin: show line field made of points from another model
I am facing some issues trying to plot some trajectories in django admin.
I have two tables: events and trajectory. Each event row has a start and end time and each row on the trajectory table ...
1
vote
0answers
20 views
Intersection between two polygons using GeoDjango
I've three models:
class Buffer(models.Model):
geom = models.PolygonField()
class ImportedPolygons(models.Model):
geom = models.MultiPolygonField()
class IntersectionOutput(models.Model):
...
3
votes
0answers
32 views
GeoDjango: Inverted coordinates in drawn polygon
I need to draw a polygon using GeoDjango Admin. I can draw it but when I render it on my map I see the coordinates inverted.
This polygon represent the Sicily, but is rendered on Eritrea and Ethiopia. ...
1
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0answers
35 views
GeoDjango query raster pixel values in PostGIS
I am building a REST API in GeoDjango that queries pixel values on a multiband raster held in PostGIS (out of db).
I have defined the following model to match the raster held on the database:
from ...
1
vote
1answer
35 views
Loading a shapefile into PostgreSQL using shp2pgsql and outputting geographical coordinates using Django to draw a polygon in Leaflet [closed]
I have been trying to put a shapefile into a PostgreSQL database. I then want to query the database with Django and output coordinates that I can use to draw a polygon in Leaflet.
So far I have the ...
0
votes
1answer
19 views
Spatial Analysis: use of buffer function inside GeoDjango's LineString model
I'm trying to make a buffer around a line. I've a model with a LineString field and I would to use the buffer function like this to make my buffer. The aim of this is render the buffer on a webmap ...
1
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0answers
27 views
Inaccurate difference operations in GEOS
I've noticed large inaccuracies in the Django GEOS API's difference operation, see the example below.
In [3]: geom1 = GEOSGeometry('{ "type": "Polygon", "coordinates": [ [ [ -19.51171875, 37....
0
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0answers
72 views
Intersecting multipolygon layer with polygon in GeoDjango
I have a Region model (deriving from django.contrib.gis.db.models.Model), with a geom field, which is a django.contrib.gis.db.models.MultiPolygonField.
I'd like to compute the intersection of this ...
2
votes
1answer
79 views
OpenLayers: map with popup and marker cluster
I'm trying to create a map with marker cluster and popup using Openlayers 5.
I'm be able to show a popup on click as you can see below
but when I try to use marker cluster the contents are no longer ...
2
votes
0answers
32 views
JSON file fails to open
I have a file that has no extension. This file resides on an internal web server and it's called by a web map application based on django python.
It looks like :
> {"crs": {"properties": {"name": ...
0
votes
1answer
27 views
Labeling a GeoJSON with OpenLayers 5
I'm trying to put a label over a polygons. My polygons cames from a GeoJSON serialized by GeoDjango. I'm be able to categorize this polygons using the attribute "type" but I wanto to see the height as ...
1
vote
1answer
104 views
Rendering polygon from GeoJSON using GeoDjango
I can't render a single polygon from a GeoJSON.
I use this model:
class AddGeometryBase(models.Model):
name = models.CharField(max_length=100)
def __str__(self):
return self.name
...
1
vote
1answer
107 views
OpenLayers 5: To display the label for a point
In my project there are two GeoJSON point layer, both has the same attribute 'name'. I would like to use this attribute for labeling all points.
I've found this similar question but it is for ...
1
vote
1answer
631 views
GeoDjango can't find GDAL:
I'm following this tutorial: https://docs.djangoproject.com/en/2.2/ref/contrib/gis/tutorial/, I installed every component necessary. But it seems like Django can't find the gdal module.
I have gdal ...
1
vote
1answer
61 views
Reproject GeoJSON with OpenLayers 5
I'm using GeoDjango to render many points on a map based on OpenLayers 5.
My points have EPSG 4326 and the map has EPSG 3857, I need to reproject the points.
On the OpenLayers API I've founded two ...
1
vote
2answers
110 views
Assign the SRID to a serialized GeoJSON
I've created a simple model like this:
class AddPoint(models.Model):
name = models.CharField(max_length=100)
geom = geomodels.PointField(srid=3857)
def __str__(self):
return self....
2
votes
1answer
56 views
Form returns 'IntegrityError'
I'm trying to create a simple form useful for put a point on a map.
models.py
from django.contrib.gis.db import models as geomodels
from django.db import models
class AddPoint(models.Model):
...
0
votes
1answer
61 views
Uncaught ReferenceError: MapWidget is not defined
I'm trying to create a form usefull to add only one single point on a map, I'm doing this for the first time. I use GeoDjango from Django 2.2 and OpenLayers 5.
I've created a simple model with only ...
1
vote
1answer
321 views
Putting content of popup into modal using OpenLayers?
I'm trying to put the content of a OpenLayers 5 popup into a Boostrap's modal but I cannot make it.
Here the code with popup; it work fine:
.
.
.
<div id="popup" class="ol-popup">
<a ...
0
votes
1answer
120 views
OpenLayers 5: this.source.loadFeatures is not a function with Cluster
I'm trying to change the example of the Clustered Feature using my points from geojson layer but there is something wrong.
var random_points = new ol.layer.Vector({
title: 'Random Points',
source:...
1
vote
1answer
162 views
OpenLayers 5: change the color of the highlighted feature
I've made a little script to highlight a feature on hover the mouse My inspiration comes from here. Now I would like to change the color of the highlighted feature. I can do this using style function ...
1
vote
0answers
123 views
Rendering 3D map in pgAdmin 4 to view Data? [closed]
I found this error 3D geometrics not rendered in view data (pgAdmin 4).
In GeoDjango I've updated my PointField model with dim=3. After successful migration, I cannot see my data in map.
My Django ...
1
vote
2answers
435 views
How do I use Django REST Framework GIS to query GeoJSON
I am trying to write the view that will return a GeoJSON of my model stored in the database. I would like to create an API so that I can use an AJAX request in a JavaScript file I have. I have not ...
5
votes
0answers
193 views
Loading multiple shapefiles in GeoDjango?
I have 3 three shapefiles and would like to upload all of them and project the result in GeoDjango admin.
a) state.shp (for the shape of a state)
b) boundary.shp (to identify a specific portion in ...
3
votes
1answer
351 views
Loading shapefile in GeoDjango and displaying it in admin section?
I am trying to load a .shp file in GeoDjango Admin. As a newbie I followed their official documentation and based on that I am trying to load my own shapefile. No errors are being shown but I can't ...
0
votes
0answers
17 views
After installing geodjango my app wont migrate
raise ValueError('String input unrecognized as WKT EWKT, and HEXEWKB.')
ValueError: String input unrecognized as WKT EWKT, and HEXEWKB.
0
votes
0answers
24 views
In Leaflet is uGeoJSONLayer the correct approach to get smaller amounts of Point data from GeoDjango?
I have a GeoDjango model containing a PointField. There are about 200,000 records spread over a large area. We view these records with Leaflet. The data only has relevance at a small scale (zoom level ...
2
votes
1answer
125 views
GeoDjango web mapping application can only view single point at one time?
I am very new to Geodjango and have been running into some issues with a web mapping application. Currently, I am trying to make it so I can view all the schools on a map at once, as well as view ...
0
votes
1answer
373 views
Django demands to set default. ValueError: String input unrecognized as WKT EWKT, and HEXEWKB
when I try to makemigrate models with Geometry fields to postgres DB
I face with next message:
You are trying to change the nullable field 'geom' on allotment to non-nullable without a default; we ...
0
votes
0answers
175 views
GDAL install path issues on Mac OSX High Sierra
trying to run Django (django==1.11.9) in a Python 3.6.3 virtualenv with PostGIS.
I've installed postgres, postgis, and gdal2 via homebrew.
when I run make, the build signals:
CPLUS_INCLUDE_PATH=/...
0
votes
0answers
29 views
GeoDjango vs SQL query gives different results when filtering points in the polygon
I have a Django model with the following field:
class PropertyPost(models.Model):
...
location=models.PointField(null=True,blank=True)
...
I am filtering the objects.locations in PgAdmin against ...
1
vote
1answer
74 views
Filtering points against polygon
I am able to run the following polygon filter against my points and it will correctly filter out my points in POSTGIS="2.4.4 r16526"
select propertypost_propertypost.*
From propertypost_propertypost
...
0
votes
1answer
830 views
Load multipolygons from GeoJSON into GeoDjango model
I have a simple model:
from django.contrib.gis.db import models
class CountryShapes(models.Model):
geonameid = models.PositiveIntegerField(primary_key=True)
geom = models.MultiPolygonField()
...
1
vote
0answers
48 views
Django raster, not add raster to BD Postgis
I am new in this world, and I am trying to make Django Raster work, I have already followed all the instructions of:
https://django-raster.readthedocs.io/en/stable/installation.html
But at the moment ...
3
votes
1answer
409 views
Get exterior ring of a multipolygon using GEOSGeometry or PostGIS
I am trying to get the exterior ring of the multipolygon in the image below using GEOSGeometry (through GeoDjango) or Postgis, but I have not found an easy solution.
This is an example of a ...
1
vote
0answers
87 views
Upload large raster file GeoDjango
I created a GeoDjango model using RasterField(). I have been trying to upload the raster using postgis. Here is how I load the raster
raster = GDALRaster('rasters/data/my_image.tif', write = True)
r ...
1
vote
0answers
418 views
GeoDjango application using SpatiaLite database
I want to create a simple GeoDjango app with SpatiaLite database but I have this error at migrate:
django.core.exceptions.ImproperlyConfigured: Unable to load the
SpatiaLite library extensio`.
...
2
votes
1answer
338 views
geodango form with geometry field and leaflet map
i use geodjango and leaflet and i want to create a django form where including geometry field with map widget (the user must to put in leaflet map) like as django admin page . i try to follow this ...
2
votes
1answer
344 views
GeoJSON to Leaflet map using Django template
I have a view that returns this GeoJSON data
{"type": "FeatureCollection", "features": [{"type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[-74.6739518440393, 40.7747050657312], [-...
0
votes
1answer
339 views
External GPS feed for HTML5 geolocation API in django-leaflet?
My goal is the following:
I'm developing a Django project. The goal is to locate places with a form. I'm using a CreateView generic view (maybe I should create it manually for more customization.
3 ...
0
votes
0answers
161 views
Display and manage (CRUD) point cloud in (Geo)Django 2
I would like to use GeoDjango to
Geolocate the place I will scan.
Would start to 3D scans with a DIY lidar based on Arduino/Rpi.
So far no worries. Then,
The Goal is to save x,y,z as input in ...
0
votes
1answer
159 views
How exactly do I use the GeoDjango Union function?
I have two models in my application:
class Organization(models.Model):
consortium = models.ForeignKey('Consortium')
org_map = models.MultiPolygonField()
class Consortium(models.Model):
...
2
votes
1answer
1k views
leaflet search control not showing up in geodjango app
I have a very basic geodjango app and I am trying to enable search control on it. I have found this question Adding a search box to a Leaflet.js example and the link brought me to what it seems like ...
0
votes
1answer
239 views
GeoDjango raster field display on Leaflet
In the new Django version support raster field and I follow this manual for GeoDjango raster field and this question for add raster I have built a simple demo.
here the code :
settings.py
postgis ...
1
vote
1answer
333 views
How to find the area of polygon in geodjango?
I need to calculate the area of the Building (which the coordinates represents). I used transform() to calculate the area, but the calculated area is not accurate. Please help me calculating the area ...
-2
votes
1answer
120 views
Loading LIDAR data to POSTGRES and use it with DJANGO [closed]
I have some project at the Faculty and I don't know from where to begin.
I have point cloud data (LIDAR data) and I need to make the website with that data on it and with functions for some sort of ...
0
votes
2answers
2k views
Error building GEOS on Ubuntu 18.04
Following the directions to install geodjango on linux ubuntu 18.04, so far here are my commands:
sudo apt-get install binutils libproj-dev gdal-bin
wget http://download.osgeo.org/geos/geos-3.4.2....
3
votes
0answers
73 views
How to dynamically determine a pixel size for raster creation?
I have a GeoDjango web service that allows a user to upload a las file (v1.2). I can derive the extent of the point cloud coverage from the file using laspy:
from django.contrib.gis.geos import ...
