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POVerify if a point is Land or Water in Google Maps
 

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    <p>..and then Google-maps "divide the waters from the waters"</p> <p>Well, not in the biblical sense but..</p> <p>I would like to know what options I have in order to verify if a point of [Lat, Lon] is Land or Water.</p> <p>Google Maps obviously has this data (the bodies of water are blue) - but is there something in the API that I can use for that? And if not - are they not serving it because they never thought of it? Or because it is too complicated?</p> <p>I have not found any info on the matter - except some similar questions here (like finding type of terrain, or elevation - but it is not exactly what I need).</p> <p>Is there separated layer for that? An option? Command? Or should I go to do that manually?</p> <p>The only way that I can think of how to approach this (should I need to do that manually) is to check every served tile for the exact point - and then check RGB value for that Google map hue. This is only on theory - because in practice - I have no idea how to accomplish that, the first obstacle being that I do not know how I can convert a pixel location on a tile to [LatLon] point for example </p> <p>A ready made solution would be much easier.</p> <p>Note that I do not need ALL the water in the world (for example - I do not care about streams, small ponds, most rivers or your neighbor's swimming pool. I need the points where a person can venture without the aid of a floating vehicle)</p> <p><strong>EDIT I</strong></p> <p>After reading comments: The elevation method is not reliable, there are too many places BELOW sea-level (you can see a list of the "deepest" 10 here <a href="http://geology.com/below-sea-level/" rel="noreferrer">http://geology.com/below-sea-level/</a> ) and there are too many land-locked water bodies ABOVE sea level (lakes). The reverse geolocation method is not reliable because it will return a Geo-political entity, like city, or state - or ZERO many times. I have already looked into those pseudo-solutions before asking the question - but none of them actually answered the question - those methods are bad "guessing" at best.</p>
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    1. USPeter O.
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    1. COYou might be able to use the elevation library. While it doesn't always hold true, I imagine that most of the time things at sea level area water. There are some rather obvious corner cases (Death Valley CA, the Netherlands, lakes in mountains, etc.) but it might work for a rough approximation.
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    2. COthanks, I have already thought of that - but like you pointed out - there are too many point below sea level on earth - excluding all of them is not a viable solution..
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    3. CO@michael - not to mention all the land-locked water-bodies that you mentioned .. (lakes etc..)
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