好的。这可能更像是一个数学问题,但我还是试一下。
我有一个经度值,假设为X。我想知道X是否介于任何两个经度值之间。
例如,如果我的X为145,范围为[21,-179]。范围由Google地图API边界给出,我可以在谷歌地图上看到X确实在该范围内。
但是,我该如何实际计算呢?
好的。这可能更像是一个数学问题,但我还是试一下。
我有一个经度值,假设为X。我想知道X是否介于任何两个经度值之间。
例如,如果我的X为145,范围为[21,-179]。范围由Google地图API边界给出,我可以在谷歌地图上看到X确实在该范围内。
但是,我该如何实际计算呢?
// check if x is between min and max, inclusively
if ( x >= minLongitude && x <= maxLongitude )
return true;
/*
* Return true if and only if the longitude value lng lies in the range [min, max].
*
* All input values should be in the range [-180, +180].
* The test is conducted clockwise.
*/
private boolean isLongitudeInRange(double lng, double min, double max) {
assert(lng >= -180.0 && lng <= 180.0);
assert(min >= -180.0 && min <= 180.0);
assert(max >= -180.0 && max <= 180.0);
if (lng < min) {
lng += 360.0;
}
if (max < min) {
max += 360.0;
}
return (lng >= min) && (lng <= max);
}
How does one force the iPhone map application to open when the link on a web page goes to maps.google.com/?q=http://example.com/mapdata.kml? If I open the map application and specifically put http://...
How to decide the current point reach on google map? I have a list of points (pickup points) of a route that I want to show in my google map with polyline. Now i have to get the current location of ...
I was wondering if anyone knew of any map APIs that offer topographical or relief data? I ve had a quick look at Google and Bing APIs, but could find nothing there. Google allow you to view a map as ...
I m experimenting with maps on different mobile platforms. Getting Google Maps to work on Android was easy, following this tutorial. Getting the same to work on Windows Mobile is a different matter. ...
I need a hand adding a custom icon to some Google Maps javascript. Code below for your reference: function populateMap() { var map = new GMap2(document.getElementById("map")); map.setCenter(new ...
I m want to display my blog as a Google Map overlay (each post contains geotags). How can I dynamically create a KML overlay from an RSS? Or better, how can I create a loop (PHP) that would display ...
我需要开放Street的标记管理员。 地图,如山角地图。
I have a hundred of UK postcodes and need to see a map with markings at that places. How can I do it using google maps API or maybe even just by creating some URL? Thanks.