leaflet

问题 I am using LeafletJs and D3js to put a bar chart in a Leaflet popup window. How can I assign a custom color for each ethnic group bar? I want to assign the custom colors within the D3 code because I can't modify the original dataset. Link Thanks. var onEachFeature = function onEachFeature(feature, layer) { colors = d3.scale.category20() var div = $('<div id="chart"><h3>Ethnic Group Distribution</h3><svg/><h4>Additional details:</h4>Extra stuff here</div>')[0]; var popup = L.popup({ minWidth:

问题 I'm now trying to feed the position of the user through the variable (coords) but every time I pass any variable into onClickUserLoc() the variable has the error Cannot read property 'lat' of undefined and when I console.log it states undefined? The coords variable holds an array of location data such as lng and lat but become undefined in onClickUserLoc(). Code: export default class App extends React.Component { constructor() { super(); this.state = { ready: false, where: { lat: '', lng: ''

问题 I am mapping markers that have a row called "marker_color" indicating "red", "yellow", and "green" based on other column values. How can I add a filter option to the corner of my map that will allow me to only show one, two, all, or none of the markers based on color? Basically, three clickable radio options to render the three colored markers. Currently, I am mapping all markers like so from my sales_colored dataframe: basemap2 = generateBaseMap() for index, row in sales_colored.iterrows():

问题 I've made a markeckuster to show some address points on my leaflet map and make them cluster: var addressPoints = [ [-37.8210922667, 175.2209316333, "2"], [-37.8210819833, 175.2213903167, "3"], [-37.8210881833, 175.2215004833, "3A"], [-37.8211946833, 175.2213655333, "1"], [-37.8209458667, 175.2214051333, "5"], [-37.8208292333, 175.2214374833, "7"], [-37.8325816, 175.2238798667, "537"], [-37.8315855167, 175.2279767, "454"], [-37.8096336833, 175.2223743833, "176"], [-37.80970685, 175.2221815833

问题 I've made a markeckuster to show some address points on my leaflet map and make them cluster: var addressPoints = [ [-37.8210922667, 175.2209316333, "2"], [-37.8210819833, 175.2213903167, "3"], [-37.8210881833, 175.2215004833, "3A"], [-37.8211946833, 175.2213655333, "1"], [-37.8209458667, 175.2214051333, "5"], [-37.8208292333, 175.2214374833, "7"], [-37.8325816, 175.2238798667, "537"], [-37.8315855167, 175.2279767, "454"], [-37.8096336833, 175.2223743833, "176"], [-37.80970685, 175.2221815833

问题 I am new to this domain of GeoInformation development. I am following the below pipeline architecture flow to achieve a GIS-based application problem. PostGIS - GeoServer - Leaflet I have set up my leaflet client application which composes tiles to a map. I am also using some leaflet plugins (like Draw, zoom) in order to give users the option to mark and to draw on the map. I am able to draw and get the GeoJSON features of the drawn polygon as shown below: I am stuck after this part of

问题 I am new to this domain of GeoInformation development. I am following the below pipeline architecture flow to achieve a GIS-based application problem. PostGIS - GeoServer - Leaflet I have set up my leaflet client application which composes tiles to a map. I am also using some leaflet plugins (like Draw, zoom) in order to give users the option to mark and to draw on the map. I am able to draw and get the GeoJSON features of the drawn polygon as shown below: I am stuck after this part of

问题 I use this R code (data was changed) to create an html file that I keep on a server: library(leaflet) leaflet() %>% addProviderTiles(providers$OpenStreetMap) %>% setView(lng=2.333333, lat=48.866667, zoom=12) %>% addMarkers(lng=2.333333, lat=48.866667, popup='Test') The problem is that when I render the file on a browser using a mobile phone, the pin and popup are extremely small and the size doesn't change when I zoom on the map. Is there a way to make the pin and popup bigger ? 回答1: The idea

问题 I use this R code (data was changed) to create an html file that I keep on a server: library(leaflet) leaflet() %>% addProviderTiles(providers$OpenStreetMap) %>% setView(lng=2.333333, lat=48.866667, zoom=12) %>% addMarkers(lng=2.333333, lat=48.866667, popup='Test') The problem is that when I render the file on a browser using a mobile phone, the pin and popup are extremely small and the size doesn't change when I zoom on the map. Is there a way to make the pin and popup bigger ? 回答1: The idea

问题 I'm working on a custom route planner in R at the moment. I'm using the output of the Google Maps Directions API. I want to show the route on a map between two places. Everything is going great so far. The only problem is that I don't know how to give the route multiple colors based on Speed at the moment. I searched the internet for a few days and I couldn't find something that fits my goal. That's why I made this post. Then I visualized it in Leafet with te following code: #install.packages