Unanswered Questions
720 questions with no upvoted or accepted answers
7
votes
1
answer
2k
views
Finding Intersection of Two Circle given Lat/Lon and radius?
I am attempting to calculate the intersection of two circle on the Earth with a given latitude, longitude and radius. I started with this Calculating intersection of two Circles?
These circles will ...
CommunityBot
- 1
6
votes
1
answer
1k
views
Math formula to calculate GPS location for weighted GPS data points
I'm working to improve the location and accuracy of a map / data-point driven application.
I have a collection of locations of interest. Each location of interest has a collection of data points that ...
CommunityBot
- 1
6
votes
0
answers
1k
views
Trilateration with error account or lack of precision
I am developing a node.js/javascript application where I would have dozens of beacons in a row (positions known), which gives me their distances to specific object (3 or 4 distances per object). The ...
CommunityBot
- 1
5
votes
0
answers
832
views
OpenLayers: Performance on satellite hybrid map (raster tiles, vector tiles, vector labels)
I've got a map with three kinds of layers, each of which serving a somewhat different function:
TileLayer: raster tiled map from an XYZ source (as .png) to show photographs in the background
...
- 333
5
votes
0
answers
327
views
Fixing buildings that do not appear in 3D using Mapbox gl js?
I'm trying to adopt this Display buildings in 3D example, but I found out that in my city (Minsk, Belarus) some buildings look flat like this:
The coordinates of this particular building are 27.552516,...
- 20.5k
5
votes
0
answers
419
views
proj4js gives wrong result for EPSG:3375
Faced with very strange issue. Trying to do coordinate transformation from EPSG:4326 to EPSG:3375 using proj4js and getting wrong result.
This is my code:
var epsg4326 = '+proj=longlat +datum=WGS84 +...
5
votes
0
answers
2k
views
leaflet returns wrong {x} {y} tiles from arcgis mapserver
I'm trying to add a leaflet map to an Angular 2 project, which shows a layer from an ESRI mapserver as a tileLayer. As such:
ngOnInit(): void {
let map = L.map('map', {
crs: L.CRS....
CommunityBot
- 1
5
votes
1
answer
1k
views
how to disable duplicate items in the legend for ArcGIS JavaScript API
I have a problem with duplicate items in the legend panel!
Can anyone help me?
This is my feature Layer with popup info:
// Feature Layer
var msFeatureLayer = new esri.layers.FeatureLayer("...
CommunityBot
- 1
4
votes
2
answers
1k
views
Decode Google Polylines in JS
I am a complete novice at coding and am trying to return a decoded polyline in array of (lat;lng) from an encoded polyline string.
I found a similar post here
Converting encoded polylines into GeoJSON ...
CommunityBot
- 1
4
votes
1
answer
285
views
Chart multiple regions on one histogram
I'm having trouble trying to chart multiple regions onto one histogram.
var urban1 = urban.first().geometry();
var pine_forest1 = pine_forest.first().geometry();
var regions = ee.FeatureCollection([
...
CommunityBot
- 1
4
votes
0
answers
3k
views
Cloud-Optimized GeoTIFF overlay on Leaflet?
I want to load external Cloud-Optimized GeoTIFF files onto a Leaflet map as overlays, and manipulate the colors based on user input. I've found examples online that appear to to this exact thing, but ...
- 36k
4
votes
0
answers
221
views
Access SharePoint data via ArcGIS Web AppBuilder Custom Widget
I need to read and write data from/to SharePoint site via ArcGIS Web AppBuilder Custom Widget. Does anybody any experiences how to do it? I tried SharePoint REST API and putting a code from this ...
- 16.3k
4
votes
0
answers
882
views
Access Elements in SVG with Openlayers 3 using forEachFeatureAtPixel()
I am trying to access elements (id, style) of a SVG image in Openlayers 3. I tried to link different examples, but the problem is that displaying a SVG is only possible with ImageStatic() and the SVG ...
CommunityBot
- 1
4
votes
0
answers
2k
views
How to convert WKT to SVG
I have some Well-known text (WKT) for representing geometry object such as Point, MultiPoint, LineString, Polygon, MultiPolygon etc. I have a multipolygon with in total 40000 Points.
I have found ...
- 181
4
votes
1
answer
1k
views
How to offset/displace overlapping lines in a web map?
I have a dataset of points representing a To/From status - something like distribution centres and delivery addresses.
When the user clicks on a point I'd like to show the relationships between this ...
- 1