kml | 易学教程

convert kml polygons to svg paths

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问题 I have a KML file with placemarkers, each of which has polygon coordinates. I'd like to change the fill color of the polygons on the fly, depending on values I read in from a json file. My understanding is that Google caches kml files, so you can't easily change the fill color of polygons on the fly. So I'm trying to convert my kml polygons into svg paths so that I can use Raphael to place my polygons on my Google map. Then I can change fill colors with javascript. But how do I convert

readOGR (rgdal) fails to fetch polygon names from XML

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问题 I am trying to import an KML map of CCG boundaries in England (Available here, 200Kb) into R using readOGR function from package rgdal . My end-goal is to create a heat-map by colouring CCGs according to some associated value. I have a list with those values next to CCG names in one data frame. I need to match CCG names in that data frame with CCG names in the imported map object, and assign colours based on the value. However, I cannot see any CCG names imported in the map object, although

Unable to rotate kml layer

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问题 I want to rotate the kml layer in my map but it is not rotating however kml file contains the rotation tag. Here is KML file. KML File I am using this code to include the kml file. var myLatLng = {lat: -25.363, lng: 131.044}; var map = new google.maps.Map(document.getElementById('map'), { zoom: 15, mapTypeId: google.maps.MapTypeId.SATELLITE, center: myLatLng }); var ctaLayer = new google.maps.KmlLayer({ url: 'https://s3.amazonaws.com/navizon.its.fp/1001/zk01w7hhv4_o.kml', map: map }); 回答1:

ASP.NET VB KML Generator

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问题 Here is a handler (ashx) file that generates KMZ files (can generate KML by not using the Ionic compression classes (Ionic = DotNetZip at Codeplex). This handler uses an SQL table to populate the place marks but is a good example of ashx handler use, custom icon use, properly compressing the file, and populating place marks. By using context.Response.OutputStream, this is very efficient within the .NET engine. <%@ WebHandler Language="VB" Class="YourKML" %> Imports System Imports System.Web

Generating a KML heatmap from given data set of [lat, lon, density]

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问题 I am looking to build a static KML (Google Earth markup) file which displays a heatmap-style rendering of a few given data sets in the form of [lat, lon, density] tuples. A very straightforward data set I have is for population density. My requirements are: Must be able to feed in data for a given lat, lon Must be able to specify the density of the data at that lat, lon Must export to KML The requirements are language agnostic for this project as I will be generating these files offline in

Reading KML files into R

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问题 I'm building a workflow for reading multiple-geometry KML files into R. This is my working map, with point and path geometries. The (reproducible) R script is: library(rgdal) setwd( {SPECIFY A FOLDER} ) download.file("http://www.scribblemaps.com/maps/kml/shackleton.kml", "file.kml") (lyr = ogrListLayers("file.kml")) map = readOGR ("file.kml", layer=lyr, verbose = TRUE, drop_unsupported_fields=T, dropNULLGeometries=T) which fails with: Error in ogrInfo(dsn = dsn, layer = layer, encoding =

How to parse KML file in Android

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问题 I want to know a simple and easy way to parse KML file and store its data in an object so that I can access its data instantly here is my kml file 回答1: You can use KmlContainer from Google Maps KML Importing Utility to access any property in a container: ... KmlLayer layer = new KmlLayer(getMap(), kmlInputStream, getApplicationContext()); Iterable containers = layer.getContainers(); for (KmlContainer container : containers ) { if (container.hasProperty("property_name")) { // process property

Is it possible with kml and google maps

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I want to know if this is possible with google maps. I create a 2 small grids on google maps with kml file. How can I find out using php of if my address is listed in grid 1 or 2. Need help please. I wrote code for doing exactly this, but rather than grids, for areas of the UK. I had to read the KML file like XML using DOMDocument::load() , this enables you to read the KML file and get the longitude and latitude points it contains. Bear in mind though that I had to change the KML slightly for this to work. Firstly after building your custom map in Google Maps right click and copy the Google

geoxml3 kml polygon tooltip on mouseover instead of click

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问题 I need an working example or a solution for hovering a kml polygon and showing the info balloon - instead of doing it on click. Is it doable? For example, on this map, instead of showing the info balloon on click, doing it on mouse over: http://www.geocodezip.com/geoxml3_test/geoxml3_test_polygon.html Obs.: my kml file has additional info inside Placemark => ExtendedData (if that helps in any way). tks :) 回答1: Here is an example that uses InfoBubble for the "tooltip" (only handles polygons):

Interactive change of KML Polygons Style in Google maps

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问题 I have a database with KML Plolygons representing german postal regions. I initialize the map like this to get the polygons displayed. var map = new google.maps.Map(document.getElementById("map"), mapOptions); var plzLayer = new google.maps.KmlLayer({ url: 'http://xxxxx.de/index.php?option=com_map&task=kml.getplz&search=542', map: map }); Everything works like a charm. I can even style the Polygons by defining styles in the kml file. My question is; how can I change the style of polygon