The simplest way to create a geographic data layer :
from geostore import GeometryTypes
from geostore.models import Layer
layer = Layer.objects.create(name='Mushroom spot',
geom_type=GeometryTypes.Point)
Layer support these geometry types :
geostore.GeometryTypes
GeometryCollection = 7 LineString = 1 MultiLineString = 5 MultiPoint = 4 MultiPolygon = 6 Point = 0 Polygon = 3
Define a geometry type to layer to force feature geometry validation.
from geostore.models import Layer, Feature
from geostore import GeometryTypes
from django.contrib.geos.geometries import GEOSGeometry
layer = Layer.objects.create(name='Mushroom spot 2')
feature = Feature(layer=layer,
geom=GEOSGeometry("POINT(0 0)")
feature.clean() # ok
# then, you can save
feature.save()
feature = Feature(layer=layer,
geom=GEOSGeometry("LINESTRING((0 0), (1 1))")
feature.clean() # ok too
feature.save()
from geostore.models import Layer, Feature
from geostore import GeometryTypes
from django.contrib.geos.geometries import GEOSGeometry
layer = Layer.objects.create(name='Mushroom spot 3',
geom_type=GeometryTypes.Point)
feature = Feature(layer=layer,
geom=GEOSGeometry("POINT(0 0)")
feature.clean() # ok
feature.save()
feature = Feature(layer=layer,
geom=GEOSGeometry("LINESTRING((0 0), (1 1))")
feature.clean() # validation error !
You can use json schema definition to describe your data content, and improve feature properties validation.
https://json-schema.org/ https://rjsf-team.github.io/react-jsonschema-form/
from geostore.models import Layer, Feature
from geostore import GeometryTypes
from django.contrib.geos.geometries import GEOSGeometry
layer = Layer.objects.create(name='Mushroom spot 4',
geom_type=GeometryTypes.Point,
schema={
"required": ["name", "age"],
"properties": {
"name": {
"type": "string",
"title": "Name"
},
"age": {
"type": "integer",
"title": "Age"
}
}
})
feature = Feature(layer=layer,
geom=GEOSGeometry("POINT(0 0)")
feature.clean() # Validation Error ! name and age are required
feature = Feature(layer=layer,
geom=GEOSGeometry("POINT(0 0)",
properties={
"name": "Arthur",
})
feature.clean() # Validation Error ! age is required
feature = Feature(layer=layer,
geom=GEOSGeometry("POINT(0 0)",
properties={
"name": "Arthur",
"age": "ten",
})
feature.clean() # Validation Error ! age should be integer
feature = Feature(layer=layer,
geom=GEOSGeometry("POINT(0 0)",
properties={
"name": "Arthur",
"age": 10
})
feature.clean() # ok !
feature.save()
geostore provide endpoint to generate and cache MVT based on your data.
You can access these tiles through Layer and LayerGroup features.
- You can define relations between layers (and linked features)
Warning
Compute relations need celery project and worker configured in your project. Run at least 1 worker. You need to fix settings explicitly to enable asynchronous tasks. GEOSTORE_RELATION_CELERY_ASYNC = True
No automatic links between features. You need to create yourself FeatureRelation between Features.
If any celery project worker is available, and GEOSTORE_RELATION_CELERY_ASYNC settings set to True, each layer relation creation or feature edition will launch async task to update relation between linked features.
By selecting intersects, each feature in origin layer intersecting geometry features in destination layer, will be linked to them.
By selecting distance, each feature in origin layer with distance max geometry features in destination layer, will be linked to them.
Warning
You need to define distance in settings: {"distance": 10000} # for 10km