I am a beginner trying to learn to Cesium JS for Web GIS projects.I downloaded and installed the Cesium 1.119 library in my laptop. Now I am not able to see the basic globe part on the screen. I have…
I am using Openlayers to create maps in a Vite React Typescript project. I am creating two maps and setting them to div elements like this: const mapRef1 = useRef<HTMLDivElement>(null) const mapRef2 = useRef<HTMLDivElement>(null) useEffect(()=>{ if(!mapRef1.current) return const map1 =…
I'd like to update the geometry definition to include a specific SRID CREATE MATERIALIZED VIEW published.ql_cmd_cruise_layer_web TABLESPACE pg_default AS SELECT ql_cmd_cruise_layer_web.cruise_id, ql_cmd_cruise_layer_web.cruise, ql_cmd_cruise_layer_web.shape_wgs84::geometry(4326) AS shape_wgs84, ql_cmd_cruise_layer_web.cruise_data_url FROM oracle_fdw.ql_cmd_cruise_layer_web WITH DATA; The geom column holds both polygons and multipolygons, so I…
The routed_way table has a column named way where the path of a vehicle is stored. The length of these paths can vary greatly, with some being short and others containing millions of points. Although the table only has thousands…
Context : I'm trying to build an architecture displaying POIs which can be at different know locations over time. I have 2 collections, pois { _id: ObjectId, name: string } locations _id: ObjectId, point: { type: 'Point', coordinates: Array<number> },…
Suppose i have the following model: from django.db import models from django.contrib.gis.db import models as gis_models class Place(models.Model): location = gis_models.PointField(geography=True, srid=4326) Later i am performing the search on those Places; my query is "fetch all places no further N…
var map = L.map('map').setView([-6.935118, 107.766995], 15); L.marker([-6.93155, 107.775831]).addTo(map) .bindPopup('Bus Stops') .openPopup(); I have this function on javascript, and I have a database that store the lat, lng, and the place name. Is there any possible way that I can do…
It seems that most databases that support GIS encode the object as a string within a function, such as: SELECT ST_GeomFromText('LINESTRING(110 40, 2 3, -10 80, -7 9)') The one exception I've seen to this is from Postgres directly (and…
Some databases support literals of the various GEO type, for example in Postgres, you can do: SELECT POINT '1,1'; And in Postgres it enforces the sub-type at the column level: SELECT POINT '1,1' UNION ALL SELECT LINE '0,0,1,1'; ERROR: UNION…
I am following this tutorial: https://somethingaboutmaps.wordpress.com/blender-relief-tutorial-final-adjustments/ I am attempting to download DEM data which is supposed to come in the form of a TIFF. Here it is: https://viewer.nationalmap.gov/basic/#productSearch I can download such TIFF from the tutorial that the website recommends.…