leaflet

问题 I'm trying to get the pixel coordinates of an image overlay on click (right click/contextmenu) using the leaflet map library. Essentially when a user clicks on the image, I need to find the x,y or width,height of where the user clicked on the image. Currently this is what I have. // Using leaflet.js to pan and zoom a big image. // See also: http://kempe.net/blog/2014/06/14/leaflet-pan-zoom-image.html // create the slippy map var map = L.map('image-map', { minZoom: 1, maxZoom: 4, center: [0, 0

问题 I'm trying to get the pixel coordinates of an image overlay on click (right click/contextmenu) using the leaflet map library. Essentially when a user clicks on the image, I need to find the x,y or width,height of where the user clicked on the image. Currently this is what I have. // Using leaflet.js to pan and zoom a big image. // See also: http://kempe.net/blog/2014/06/14/leaflet-pan-zoom-image.html // create the slippy map var map = L.map('image-map', { minZoom: 1, maxZoom: 4, center: [0, 0

问题 I would like to use the package leaflet with R to draw a map of a specific countries such as Italy, Spain, etc. I checked the basic examples with the function setView() and I tried to give a vector of two values for the arg of latitude and longitutde : m <- leaflet() %>% addTiles() %>% # Add default OpenStreetMap map tiles setView(lng=c(46.00,48.00), lat=c(2.00,6.00), zoom = 4) m # Print the map (map is not centered on a country, it's just a test) But I will never be able to have a specific

问题 I am writting web application using only angularjs. I am currently using Leaflet to display a map on a webpage. I am able to display a map succesfully with out any problems, I am also using leaflet.draw to draw a rectangle and to get all 4 coordinates. Now, what I want to do is to do this same thing but offline. I want to user to be able to use this application without internet conectivity. I want to user to see America and Atlantic Ocean and be able to zoom in several levels. I dont need

问题 Suppose I have an Angular 2 app that wraps a third party library such as the Leaflet Mapping API that does it's own DOM management. Invoking the third party library components from Angular I have working. However, in the Leaflet example, what if I want to render one of my Angular components /inside/ some markup rendered by the third party library. For example, is it possible to render a component from my Angular 2 app inside a Leaflet popup? http://leafletjs.com/reference-1.1.0.html#popup Or

问题 Suppose you have the following data frame: cities = data.frame( name = c('Madrid','Barcelona','Sevilla'), country = c('Spain','Spain','Spain'), region = c('Comunidad de Madrid','Cataluña','Andalucia'), data = c(100, 200, 300), lng = c(-3.683333,2.166667,-6.083333), lat = c(40.433333,41.383333,37.446667)) My idea is to have a map of these cities and labels that could display some relevant information when hovering the corresponding city circles. I'd like to have the label text arranged in

问题 I have the below react class which fetches the geolocation through the browser. I am mapping a leaflet map. I want to geolocation to be an input to the setView, for such that the map "zooms" into the region of the client browser location. Here's the react class: import React from 'react'; import L from 'leaflet'; import countries from './countries.js'; var Worldmap = React.createClass({ render: function() { let geolocation = []; navigator.geolocation.getCurrentPosition(function(position) {

问题 Currently I'm able to draw a straight line between countries using the following code: library(leaflet) leaflet() %>% addTiles() %>% addPolylines(lat=c(38.8833, 35.00), lng=c(-77.0167, 103.00)) What I'm trying to produce is a more realistic flight path, where the straight line is actually curved. Similar to this: For the sake of this question, I'd like to tailor the answer within the Leaflet package. Any help would be much appreciated. 回答1: following up on mrub, just pass the object you get

问题 I am using RStudio to create some some leaflet images. I would like to be able to save the output as an HTML so that it can be emailed and others can view it. Below is some sample R code which was taken from [here] to create a sample leaflet image. devtools::install_github('rstudio/leaflet') library(leaflet) rand_lng = function(n = 10) rnorm(n, -93.65, .01) rand_lat = function(n = 10) rnorm(n, 42.0285, .01) m = leaflet() %>% addTiles() %>% addCircles(rand_lng(50), rand_lat(50), radius = runif

问题 in an attempt to create map like this one with my data frame and filters I found leaflet doesn't reflect any of the long. or lat. accordingly no pop up to show.dataset & css the code library(shiny) library(dplyr) library(leaflet) library(readr) CBdata <- read_csv("/cloud/project/TESTLEAF/www/cblnglt.csv") df0<- data.frame("cho"=c("No schooling completed","vocational","Bachelor","Post Graduate ","Single","Married","Divorced","others","male","female","under_20","21_30","31_39","31_40","41_50",