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Algorithm - How to build a polygon around a polyline

I am building a web site using googles Map API. However, as I am on a shared server, I do not have access to a database with spatial extensions.[详细]

2023-02-28 18:15 分类：问答
Consume MySQL WKB geometry on iOS for MapKit

I know how to convert MySQL geometry from binary to text and then transfer/convert it for use in MapKit. However, this seems unnecessarily inefficient. I\'m looking for a way to transport the binary s[详细]

2023-02-27 23:39 分类：问答
Cut polygons using contour line beneath the polygon layers

I would like to cut a polygon layer, according to the elevation, into two parts (upper and lower part). The polygon might convex or concave, and the position to cut might vary from each other. The con[详细]

2023-02-27 00:14 分类：问答
Good books/articles about spatial indexes [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.[详细]

2023-02-23 13:18 分类：问答
Is there a web service that provides terrain type at lat/lon?

I\'m wondering if there is a (free?) web service that will return the type of terrain at a specific latitude and longitude?[详细]

2023-02-23 12:03 分类：问答
Need driving distance library/application I can talk to

We need to calculate driving distances for records in a SQL Server database, so I need to find some sort of library or program that will let me do so without connecting to the internet(if it has it\'s[详细]

2023-02-22 19:52 分类：问答
How To Develop LBS app for Android

I want to develop a LBS app for Android,but I do not know how to begin the project. I want to use the Google Map API to use the map data of Google.The user can also add information on map,and the inf[详细]

2023-02-22 11:28 分类：问答
Efficient sorted bounding box query

How would I create indexes in PostgresSQL 8.3 which would make a sorted bounding box query efficient? The table I\'m querying has quite a few rows.[详细]

2023-02-21 02:12 分类：问答
Creating Google Map Overlay with Geotools

Good morning, I want to create a Google Maps overlay from GeoTiff data I read with Geotools. I\'m new to Geotools and I wasn\'t abl开发者_高级运维e to find any documentation about creating map tiles[详细]

2023-02-20 11:29 分类：问答
MySQL Spatial Extensions: Getting records that fall with in a certain area

I am wanting to use the MySQL spartial extension for a project. What it is a javascript viewer will send the edges of the viewable area so the most weaterly, easterly and north and sothern points as t[详细]

2023-02-19 06:21 分类：问答