turfjs

问题 I have generated parallel lineString on map by using Style geometry options for Single Feature Object in openlayer v5.2 with different-different width stroke after modified the found reference link on http://jsfiddle.net/CPRam/egn1kmc8/. While using geometry with call function in style function I'm not getting the geometry on single click event for the Style. So for that, I removed call function and given fixed resolution with distance for parallel. So now on 'singleclick' event, I'm able to

来源： https://stackoverflow.com/questions/49354133/turf-js-to-find-bounding-box-of-data-loaded-with-mapbox-gl-js

来源： https://stackoverflow.com/questions/49354133/turf-js-to-find-bounding-box-of-data-loaded-with-mapbox-gl-js

问题 I need a transform from geo coord system to/from another coord system. I'd think the obvious way to do this would be to give the two bounding boxes of the systems. So if I had a geo bbox, in lon/lat coords, and a non-geo bbox that corresponds to that but in my own coordinates, I'd like a xfm that could convert geo-to-me and me-to-geo. I need this for an agent based programming environment that has its own coord system based on minX, minY, maxX, maxY, just as Turf expresses bboxes. It would

问题 I am making a Leaflet map. I am loading some geoJSON data. I have an on click function for the map. When I click I simply want to alert the nearest point from the loaded geoJSON. The problem is that only one point is returned no matter where I click in the city ( the point shown in the image below. //Create the map var map = L.map('mapdiv').setView([-43.534384, 172.640528], 13); // Add the basemap L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', { attribution: '© <a href=

问题 I am making a Leaflet map. I am loading some geoJSON data. I have an on click function for the map. When I click I simply want to alert the nearest point from the loaded geoJSON. The problem is that only one point is returned no matter where I click in the city ( the point shown in the image below. //Create the map var map = L.map('mapdiv').setView([-43.534384, 172.640528], 13); // Add the basemap L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', { attribution: '© <a href=

问题 I have a function to get the nearest points (farmers) to a specific point(customer),i made a buffer around the customer with distance from the user then i am using turf.within to get all the points(farmers) inside this buffer. It works fine if i give the array of coordinates in the feature collection in the variable searchWithin ,but when i gave it as a variable (array) which is in this case the points of the buffer bufresult it doesn't work. function Find_Nearest() { //getting the orderid to

问题 I am using OpenLayers3 ol.interaction.Draw to let the user draw a shape on the map, either by clicking vertices or by Shift+Drag to draw a freeform polygon (this is important to my application). Once a shape is drawn, I use turf.js to compare the drawn shape to a WFS layer in the client, running intersect() to see if the WFS features intersect the drawn shape. However, if the hand drawn shape has even the slightest self-intersection, the turf.js intersect() function fails with the following

问题 So far I have created a marker, transfered it to geoJSON, and created a buffer around it with Turf.buffer. How can I get this buffer to "stick" to the marker as I drag it around the map? <script> L.mapbox.accessToken = 'fg.eyJ1IjoisdflksdaklsjZWwiLCJhIjoiRHNwX0ZWNCJ9.Ov2O5sslkdqV93_R0lq3Q'; var map = L.mapbox.map('map', 'example.kf6j9ec4') .setView([38.633, -90.319],12); var marker = L.marker(new L.LatLng(38.633, -90.319), { icon: L.mapbox.marker.icon({ 'marker-color': '1B05E3', "marker

问题 I want to calculate collision area of two polygons (rotated rectangles). I want to calculate what area of the polyA is in the collision area (%). 回答1: turf.js (advanced geospatial analysis for browsers and node) provides turf-intersect and turf-area packages. These can be used to calculate collision and area of intersection of two polygons. In turf, rectangles (polygons) are described using features, e.g. a description of a pentagon: var polyA; polyA = { type: 'Feature', geometry: { type: