openlayers-3

来源： https://stackoverflow.com/questions/44287161/serve-geoserver-tiles-in-xyz-format

来源： https://stackoverflow.com/questions/37250892/no-such-property-geometry-when-updating-feature-in-openlayers-3-geoserver

来源： https://stackoverflow.com/questions/37250892/no-such-property-geometry-when-updating-feature-in-openlayers-3-geoserver

来源： https://stackoverflow.com/questions/63774440/how-to-add-tilegrid-to-tile-layer-in-openlayer-6-4-3

问题 How do I draw an arrow over a vector layer in Openlayers 3 map? I tried creating an arrow using canvaselement but don't know how to draw it over the ol3 map. 回答1: A canvas element is not necessary. You can take the arrow example from the Openlayers site and add 2 custom LineString elements instead of the icon. You already have in the example the rotation angle in radians and the event where you should add your code. Hopefully the following snippet does the trick: var source = new ol.source

问题 I am interested in creating heatmaps in OpenLayers to visualize the density of certain observations in space. My data comes in the form of GeoJSON files, some of which contain point features, while others contain LineStrings. I was able to create a vector source from the GeoJSON files containing points, successfully visualizing a heatmap layer from that source. However, I am unable to create a heatmap following the same procedure with the GeoJSON files contaning LineStrings. Is this

问题 I am interested in creating heatmaps in OpenLayers to visualize the density of certain observations in space. My data comes in the form of GeoJSON files, some of which contain point features, while others contain LineStrings. I was able to create a vector source from the GeoJSON files containing points, successfully visualizing a heatmap layer from that source. However, I am unable to create a heatmap following the same procedure with the GeoJSON files contaning LineStrings. Is this

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . I'm looking to update my application from OpenLayers 2 to OpenLayers 3. Is anyone aware of a Migration Guide (or something similar) that would help with this? 回答1: FWIW - We'd like to contribute as we migrate our simple-minded page at http://www.nufosmatic.com from ol2 to ol3. The

问题 I am trying to save changes via WFS-T using GeoServer: This is my code that is getting feature from geoserver var sourceWFS = new ol.source.Vector({ loader: function (extent) { $.ajax('http://127.0.0.1:8080/geoserver/kairosDB/ows', { type: 'GET', data: { service: 'WFS', version: '1.1.0', request: 'getFeature', typename: 'wfs_geom', srsname: 'EPSG:3857', bbox: extent.join(',') + ',EPSG:3857' } }).done(function (response) { sourceWFS.addFeatures(formatWFS.readFeatures(response)); }); }, //

问题 I am trying to save changes via WFS-T using GeoServer: This is my code that is getting feature from geoserver var sourceWFS = new ol.source.Vector({ loader: function (extent) { $.ajax('http://127.0.0.1:8080/geoserver/kairosDB/ows', { type: 'GET', data: { service: 'WFS', version: '1.1.0', request: 'getFeature', typename: 'wfs_geom', srsname: 'EPSG:3857', bbox: extent.join(',') + ',EPSG:3857' } }).done(function (response) { sourceWFS.addFeatures(formatWFS.readFeatures(response)); }); }, //