maps

Map Highlight Odd/Even Side of Street

由 夙愿已清 提交于 2019-12-06 10:08:24
I have two coordinates of a street. Either both Odd or Even. So for example 15 ABC Street and 77 ABC Street (with their reverse geocode). I'm trying to draw a path line that is near the sidewalk. I used google maps api and did not find a way to do it. The directions api draws a line in the middle of the road, and I cannot find a way to do a geometric translation to either side of the street. I don't mind using any other API as long as I can solve the problem. 来源： https://stackoverflow.com/questions/33886715/map-highlight-odd-even-side-of-street

Calculate X and Y position on a PNG Map from GPS Coordinate

由 拥有回忆 提交于 2019-12-06 09:37:08
I'm implementing a custom maps (image with size map_width and map_height) on an iPhone app and i try to show the current user position on this map (current_long and current_lat) I have 2 references points with a known GPS coordinates (ref1_long, ref1_lat, ref2_long and ref2_lat) and known X, Y positions in pixels (ref1_x, ref1_y, ref2_x and ref2_y) My question is: how to calculate the current_x and current_y according to these informations ? You need to know the projection of the map. There are hundreds of different map projection and many of them can have the important constants that can have

Overlay.draw() calls many times

由 浪尽此生 提交于 2019-12-06 09:35:51
问题 I have a question regarding the draw() method of the Overlay class in Android Maps. When I move map, method draw() get called a few times (from 4 to 13). It's a problem for me, because this method must repaint my route with 70000+ points, and this is a lot resources. I can't find description for this problem, but when I use code examples from any sources, I have same problem. 回答1: This is the normal behaviour. When you move the map, you expect it to move smoothly and to achive that any map

Creating map of Africa using d3.js and topoJSON

由 不问归期 提交于 2019-12-06 09:28:36
i want to create map of Africa using d3.js and topoJSON. I have that datasource https://gist.githubusercontent.com/bricedev/3905007f1794b0cb0bcd/raw/ad5c995f6990f7c3c7fad5c6206bc6fd5462f1fb/africa.json That is my code. How i can get properties and create correct map? Please help me where is the error? <!DOCTYPE html> <html> <head> <meta name="description" content="D3byEX 12.15" /> <meta charset="utf-8"> </head> <body> <script src="http://d3js.org/d3.v3.min.js"></script> <script src="http://d3js.org/topojson.v1.min.js"></script> <script> var width = 1000, height = 728; var svg = d3.select("body

Changing the text in legend in ggplot map R Studio

由 混江龙づ霸主 提交于 2019-12-06 09:24:41
I am trying to create a US map filled with heat level of flu diseases. I am having 2 issues: I couldn't change the variable text in the legend. The order of the legend is wrong. 1->10->2->... Here is the code. library(maps) library(ggplot2) # Get all states data all_states <- map_data("state") # Clean the data subHeat <- subset(q4_heatMap, WEEK=="4") region <- tolower(subHeat$STATENAME) stateHeat <- subHeat$ACTIVITY.LEVEL stateHeat <- gsub('Level ', '', stateHeat) usHeat <- data.frame(region,stateHeat) # Merge two set of dataframes heatTotal <- merge(all_states, usHeat,by="region") # heatColor

Scale a circle's radius (given in meters) to D3.js d3.geo.mercator map

由 不问归期 提交于 2019-12-06 09:23:13
I am using D3.js and TopoJSON libraries to render a flat SVG map of the world in a small div on a web page. I'm also taking some geographic objects (polygons and circles), and plotting them on this map via lat/long coordinates. This all seems to be working pretty well, however, the circle objects that I am plotting on the map contain a radius element which is given in meters. I cannot find or figure out how to convert/scale this measurement appropriately onto the SVG map. Any help would be greatly appreciated. The snippet of code that is drawing the circle and setting is: if

Fix up shapely polygon object when discontinuous after map projection

由 别来无恙 提交于 2019-12-06 09:06:29
问题 This demo program (intended to be run in an IPython notebook; you need matplotlib , mpl_toolkits.basemap , pyproj , and shapely ) is supposed to plot increasingly large circles on the surface of the Earth. It works correctly as long as the circle does not cross over one of the poles. If that happens, the result is complete nonsense when plotted on a map (see below cell 2) If I plot them "in a void" instead of on a map (see below cell 3) the results are correct in the sense that, if you

IndexSizeError using google maps v3: using google.maps.Marker

由 Deadly 提交于 2019-12-06 07:55:14
问题 I'm creating a page with jquery and google maps v3 and I'm trying to show a marker on a google maps. For some reason I'm getting an error with Firefox (and the marker isn't showing on the map): Error: IndexSizeError: Index or size is negative or greater than the allowed amount Source File: http://maps.gstatic.com/intl/en_us/mapfiles/api-3/9/17/main.js Line: 96 Facts: * It works in Safari * It works if I change the MarkerImage url Code that I'm using to add the marker is the following: var

springboot-yml内list、map组合写法

由 ﹥＞﹥吖頭↗ 提交于 2019-12-06 07:48:53
myProps: varmaplist: key11: - t1 - t2 - t3 key22: - t11 - t22 - t33 list: - topic1 - topic2 - topic3 maps: {key1: 'value1', key2: 'value2'} @Component @Data @Configuration @PropertySource(value = {"classpath:/bootstrap.yml"}, encoding = "utf-8") @ConfigurationProperties(prefix = "myProps") public class MyProps { private List<String> list; private Map<String,String> maps; private Map<String,List<String>> varmaplist; } 转载自https://www.cnblogs.com/neaos/p/10790528.html 来源： https://www.cnblogs.com/wenbuzhu/p/11968966.html

How to draw lots of markers on a map

由 自闭症网瘾萝莉.ら 提交于 2019-12-06 07:34:41
I'm trying to draw on a map using markers. The problem I'm having is when I try to add lots of them, then I can't get it to run. To illustrate my problem, let's say I want to draw a square made of 900 smaller squares (30x30). By the way, I do need those squares, not just one big square I'm trying to add the markers to an itemizedoverlay, then drawing it. the code is below. Any suggestion how I could do that? Thank you very much!! public class MainActivity extends MapActivity { MapView mapView; MapController mc; GeoPoint p; static Context context; int k=1; List<Overlay> mapOverlays;
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