geodjango

问题 I'm using GeoDjango with PostGIS and trying to use a polygon to get records from a database which fall inside it. If I define a polygon which is bigger than half the area of the earth it assumes the 'inside' of my polygon is the smaller area which I intended as the 'outside' and returns only results which are outside it. I can just use this smaller, wrong area to exclude results. Polygon.area seems to know what I intend so I can use this to determine when to make my search inclusive or

问题 I'm starting a GeoDjango project using Python 2.5, Django 1.2, MySQL and Apache. The project will be uploaded to a Linux server but the development will be on a Windows. The problem is I just can't get passed installing GEOS, how is it done? 回答1: I follow the instructions in http://docs.djangoproject.com/en/dev/ref/contrib/gis/install/#windows For the instalation of GEOS library in windows i use this: http://trac.osgeo.org/osgeo4w/ 回答2: what I did is to install GDAL from this answer, Unable

问题 My model has two fields (latitude and longitude) that I want to combine to form a point object. However, I cannot figure out how to filter based on a combination of those values: For example: >>> from django.contrib.gis.geos import Point >>> lat = 5 >>> lon = 1 >>> pnt = Point(lat, lon) >>> buf = pnt.buffer(0.0001) >>> z = Thing.objects.filter(pnt__intersects=buf) FieldError: Cannot resolve keyword 'pnt' into field. ## I dont have a model field named pnt I realize this is not the right

问题 I have two models and need to serialize Article as Geojson by setting the geo_field attribute as point from the Location model. After following the solution given here I get the error: Got AttributeError when attempting to get a value for field `point` on serializer `ArticleSerializer`. The serializer field might be named incorrectly and not match any attribute or key on the `Article` instance. Original exception text was: 'ManyRelatedManager' object has no attribute 'point'. Here are my

问题 I cannot import GeoIP in django. I searched and tested this error two days, but still could not know problem. Surely, I installed GeoDjango. I'm on MacOS 10.8 following is log by tested by django shell 1>>from django.contrib.gis import geoip 2>>module 'django.contrib.gis.geoip' from '/Library/Python/2.7/site-packages/django/contrib/gis/geoip/ init .pyc'> it works. even I could find geoip class at Library/Python/2.7/site-packages/django/contrib/gis/geoip/base.py 3>>> from django.contrib.gis

问题 I have two models with a many-to-many relationship and I am trying to return some geojson by using the Django REST Framework. The data I am trying to return is th pub_date and coordinates (represented by a PointField in GeoDjango). Everytime I try and return the geojson I get the error Field name 'city' is not valid for model 'Article' . I'm pretty new to django/geodjango and this is the first time I've used the Django REST Framework. I've gone through the docs but can't work out where I'm

问题 I have a model with a GeometryField . Like this - from django.contrib.gis.db import models as geo_models class School(BaseModel): # Some fields centroid = geo_models.GeometryField(blank=True, null=True) And I'm filtering the values with the values() method because I have to generate a JSON out of the QuerySet - class SearchView(View, JSONResponseMixin): def get(self, *args, **kwargs): params = self.request.GET results = {} schools = School.objects.values('id', 'code', 'name') # More stuff

问题 I want to deploy geodjango in aws beanstalk. I have already tried this solution. It worked before. commands: 01_yum_update: command: sudo yum -y update 02_epel_repo: command: sudo yum-config-manager -y --enable epel 03_install_gdal_packages: command: yum --enablerepo=epel -y install gdal gdal-devel packages: yum: git: [] postgresql96-devel: [] gettext: [] libjpeg-turbo-devel: [] libffi-devel: [] But right now it's showing this error. AttributeError: /usr/lib64/libgdal.so.1: undefined symbol:

问题 I have an application that has been storing longitude and latitude now i want to integrate it with geodjango the application looks like this. class Location(models.Model): #other fields here lat = models.CharField(blank=True, max_length=100) lng = models.CharField(blank=True, max_length=100) now I will like to filter locations based on a distance say filter all location 1km away from location with pk = 1 using django.contrib.gis.measure import D and GEOSGeometry or should i refactor the model

问题 I was wondering how I could change the default PointField visualization (the Openstreetmap) in admin so that I could enter simple latitude/longitude instead of select a point on the map? I looked at this one Latitude/longitude widget for pointfield? but could not get it working in any way in Django 1.6b4 Thanks 回答1: As Bibhas says you can override the widget used for the field, but the simple text input may not be usefull. So here is an example with a full widget that can be used for