maps

问题 I am trying to plot lines using leaflet, however I am encountering some difficulties in separating the segment. I have an object that looks like this > head(trips, n=15) time.start time.end long.start long.end lat.start lat.end distance time.diff speed color 1 1476450598 1476450713 9.03913 9.03924 45.61335 45.61362 31.25292 115 0.9783524 green 2 1476450713 1476450727 9.03924 9.03995 45.61362 45.61365 55.38651 14 14.2422459 green 3 1476450727 1476450751 9.03995 9.04005 45.61365 45.61340 28

问题 This question already has an answer here : Python Test If Point is in Rectangle (1 answer) Closed 2 years ago . I have a coordinate point of a place, for example: point_coord = [-7.7938593,110.3634829] I also have a viewport of an area contain two point of corrdinates, for example: northeast = [5.9052479,141.0194444] southwest = [-11.005261,95.01106190000002] If I illustrate these point, it will be look like this: The question is, how do I check if the point_coord is fall or lies in somewhere

问题 I am having an issue where the dom listener at the bottom of my google maps function in an external Javascript file is causing a "google is not defined" console error. This happens when I go to a different HTML page on my website that also accesses script in the external file. I believe it is because the DomListener is outside the function however the function does not work if the dom listener is inside the function. Can someone please help me with where to put this DomListener to stop this

问题 How can i get this function out of the i iteration loop, since jshint gives me an error. for (i = 0; i < portfolios.length; i++) { return function () { for (h = 0; h < markers.length; h++) { markers[h].infobox.close(); } markers[i].infobox.open(map, this); }; })(marker, i)); } } thanks! 来源： https://stackoverflow.com/questions/21742651/a-loop-within-a-function-that-is-also-in-a-loop-gives-an-error

问题 I am working to get Instagram results from a shape drawn on a map. Instagram needs lat and lon + radius. https://api.instagram.com/v1/media/search?lat=48.858844&lng=2.294351&access_token=ACCESS-TOKEN What my issue is I can do this if I use circle but for rectangle I am not getting what to send to api. My image/ map plus rectangle. If I use getBounds(); Then I get _northEast Object { lat=33.97980872872457, lng=-82.166748046875, equals=function(), more...} _southWest Object { lat=33

问题 I'm confused on how to handle zoom events with Nokia Here maps. Usually for example map.addEventListener('dragend', function(){....}) why cant the same signature work for something like map.addEventListener('zoomend', function(){....}) I know there is a event called mapviewchangeend but how will I use that to know if it was a zoom change rather a drag Thanks! 回答1: The supported map events are documented here , i think simplest way to achieve your requirement would be to check the map zoom

问题 I was trying to create a Plotly map in R using plot_geo. I wasn't getting any errors, but the Viewer was returning a blank map. The Plotly mode bar was showing up, but everything else was blank. I couldn't even get the code below from the plot_geo help page to work: library(plotly) library(dplyr) map_data("world", "canada") %>% group_by(group) %>% plot_geo(x = ~long, y = ~lat) %>% add_markers(size = I(1)) Has anyone else ran into this problem? I haven't had any trouble with plotly in R in the

问题 I am creating android app that populates the list of GPS co-ordinates which was entered by the user using custom adapter like this SELECTION LAT LONG DISTANCE ------------------------------------------------- checkbox1 123.4546 456.48751 Text checkbox2 123.4546 456.48751 Text checkbox3 123.4546 456.48751 Text checkbox4 123.4546 456.48751 Text If user selects the check-box 1 then i have to find the distance from check-box 1 lat long to check-box 2,check-box 3,check-box-4 lat long .Here i need

问题 I'm making a Google Maps Application which one of the functions is to generate maps from user traveled distance. I do this by adding PolyLines to my map fragment so the user can see the path he just traveled. However, after the user is done recording his route I want to export those PolyLines as a .kml file so the user can travel the same path next time, but I don't know if I should use a XML parser to make the file myself or is there any way to actually export all the contents from the

问题 I just started learning leaflet and the trying to learn things as I implement them in my project. The leaflet time slider here is one of my first 3rd party contributor implementation that I'm attempting. I followed the directions in a straight forward manner. Below is the simplified code: html <div id="map"> </div> <script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script> <script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="http:/