I want to write 开发者_如何学JAVAan iPhone app, that will need to do a distance based search (eg. find results within 100km)
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The function below creates a polygon square out of 4 points and I assume the last 5th point closed the squar, I need it to have at least 24 points and to make up a circle. Any ideas?
I have a SQL Server table with hundreds of thousands of geometry type parcels. I have made indexes on them trying different combinations of density and objects per cell settings. So far I\'m settiling
I\'m thinking about creating a location-aware iPhone app that could work offline by coming packaged with a list of points of interest (POIs).The app would read the user\'s current location from CoreLo
Does anybody know what the C# equivalent of fmod is?I\'m trying to convert this li开发者_如何学Gone of code to C#.
Given a coordinate (lat, long), I am trying to calculate a square bounding box that is a given distance (e.g. 50km) away from the coordinate.So as input I have lat, long and distance and as output I w
I\'m trying to import some Shapefile mapping data into Sql2008. Before I do that, I need to convert it to WGS84 / SRID 4326, because all my existing data is in this format.
I\'ve implemented this method in Javascript and I\'m roughly 2.5% out and I\'d like to understand why.
I have a map that is cut up into a number of regions by borders (contours) like countries on a world map. Each region has a certain surface-cover class S (e.g. 0 for water, 0.03 for grass...). The bor
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