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Results tagged with openlayers
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user 18859
Use when the version you are using of the OpenLayers JavaScript client toolkit is 3 or later
1
vote
1
answer
23
views
OpenLayers why are there no features when converting non-zero Selected features to JSON
Using OpenLayers with a Select interaction to select features, I'm attempting to convert the selected features to JSON for further processing within the select.on('select', ...) as per the code below. …
- 8,436
0
votes
1
answer
45
views
OpenLayers prevent DragPan from bottom of screen
My OpenLayers app runs on iPhones in full-screen. … In my OpenLayers app, this gesture is also recognised simultaneously by OpenLayers as a DragPan interaction. …
- 8,436
0
votes
0
answers
458
views
OpenLayers 'Canvas area exceeds the maximum limit' error in WKWebView
I'm using OpenLayers 6.13 in an iOS app. The app also runs on macOS (Mac Catalyst). The OpenLayers component runs in a WKWebView (essentially a Safari-esque web browser view, embedded in the app). … How can this error be avoided in larger windows with OpenLayers? …
- 8,436
1
vote
2
answers
376
views
OpenLayers won't display polygon (or line) with zero size
Using OpenLayers 6, my app will not display anything for a Polygon (or line) where all the vertices have the same coordinates. …
- 8,436
0
votes
1
answer
295
views
OpenLayers fullTileRanges of tileGrid no longer easily available in 6.13
Getting the details of a tileGrid was working fine in OpenLayers 6.5, but I've just upgraded to OpenLayers 6.13 and now the tileGrid keys are no longer available in plain English. … Instead there are only the coded keys (which presumably change with each build of OpenLayers. …
- 8,436
2
votes
1
answer
951
views
OpenLayers line labels with 'line' placement not working
Using OpenLayers 6.13.0, I'm attempting to get my lines layer to have labels that follow the line (ie, parallel to the line, and bending with the line) as per the example at: https://openlayers.org/en …
- 8,436
0
votes
0
answers
834
views
OpenLayers 'wrapX' not working on ol.source.XYZ() source
I recently posted a question about a WMTS layer not appearing in my OpenLayers map, and the resolution turned out to be that I needed to add the 'wrapX' option (or otherwise to pan all the way around the … Full JS code Using OpenLayers 6.5.1 is below:
function newLayerTileGrid(urlTemplate, tileGridJSON, projCode, projString) {
var tileGrid = new ol.tilegrid.TileGrid( JSON.parse( …
- 8,436
2
votes
1
answer
673
views
OpenLayers WMTS function no longer working - No error messages
WMTS layers have been rendering in OpenLayers 6.5.1 flawlessly in from my code for some time now, but it has recently stopped working. … I can't actually think of anything that I've recently changed in the OpenLayers part of the app, so I've cut it down to a simple OpenLayers-only HMTL+JavaScript and it is still not rendering a WMTS layer …
- 8,436
3
votes
1
answer
481
views
OpenLayers Source - how to get Attributions
Using OpenLayers 0.6.5, I want to be able to copy the attributions from one source, and set the same value for the attributions of another source. …
- 8,436
3
votes
1
answer
827
views
OpenLayers dynamic JSON Vector Source works in OL v3 but not OL v6
I'm using OpenLayers display a map which can include vector layers with dynamic features (ie, the lines/points change frequently). … This was all working fine in OpenLayers v3.x but stopped working after upgrading to v6.5. …
- 8,436
2
votes
1
answer
1k
views
OpenLayers custom tileGrid for scanned map image - How to calculate resolutions?
I'm using OpenLayers 3 and attempting to display a layer based on a custom tile grid in a custom projection (EPSG:4202) on a standard projection map (EPSG:3785). … This also implied by the insane number of tiles that OpenLayers wants to fetch (and when zoomed out, the OpenLayers error that appears in the JavaScript console when zoomed out that says: Assertion Failed …
- 8,436
4
votes
1
answer
2k
views
Programatically Cache WMTS for Offline Use
The app uses online map services, including WMTS, WMS, TMS, XYZ and makes heavy use of OpenLayers to display these. … Can anybody provide advice on how to convert online WMTS to an offline cache that I can feed into OpenLayers? …
- 8,436
0
votes
1
answer
212
views
Why does setting extent in OpenLayers end up with an adjusted extent?
If I run the following code in OpenLayers 3... …
- 8,436
5
votes
1
answer
9k
views
OpenLayers and proj4js.defs() - why does one custom projection work and not the other?
It is based on OpenLayers example code, but I've defined the map projection using proj4js. … From the OpenLayers API documentation at https://openlayers.org/en/latest/apidoc/ol.proj.html :
[OpenLayers] will check if the Proj4js library and the necessary definition are loaded; if so, it will …
- 8,436
4
votes
4
answers
15k
views
How to get map units to find current scale in OpenLayers?
I need my OpenLayers application to be able to determine the current scale. This is not for display (there is already the scale line for that). … How can I get the current map unit from OpenLayers?
Or can I get it from proj4.js for the current projection? (and if so, is that the same thing?) …
- 8,436