gis

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Finding row with coordinates inside a defined polygon in MySQL

I\'m trying to figure out how to go about returning a set of r开发者_如何学Cecords which have coordinates within a polygon.[详细]

2023-03-05 02:17 分类：问答
Visualize text file with location info and intensity

I have an ascii text file containing location data (column 9-lat and 10-long) and intensity(column 20)[详细]

2023-03-02 12:32 分类：问答
open raster in R! and some statistical operation

I would like to open raster files (in ASCII or TIFF format), aggregate their cells and after this operation count correlation between values in this new raster file and another one. Unfortunately I do[详细]

2023-03-02 04:51 分类：问答
How to get all parks of the world with address and lat/lng

I am trying to import a list of all parks in the world and data about them.I need the following information:[详细]

2023-03-01 18:55 分类：问答
.NET library for geodata, mapping

We have a web-based application with a mapping component (ASP.NET/SQL Server 2005, Google Maps API). The mapping component is evolving - it started out as a simple, nice-to-have feature and is gradual[详细]

2023-03-01 15:11 分类：问答
How to convert a bing maps quadkey to mercator coordinates

How do you convert a bing maps quad key, such as \"03200320023\" to coordinates in mercator virtual earth (epsg 3857) coordinate system?[详细]

2023-03-01 14:20 分类：问答
What database should I use that would best suit my GIS application?

I am currently in the process of developing a program and not sure where to go from here... I am using Visual C# and the DotSpatial frawework in order to do the GIS/GPS side of things but am unsure o[详细]

2023-03-01 06:00 分类：问答
How register OCX library on Win7 Prof x64 EN

I have a problem with my MapWinGIS.ocx file on Windows 7. I try to register this control in two ways: Using regsvr32 (from system32 directory and from SysWOW64 directory), but I get error message l[详细]

2023-03-01 05:45 分类：问答
How to put all countries/cities/states of the world into my database?

I have a difficult architectural and web problem.I am trying to make a page about hiking for every city in the world for http://www.comehike.com[详细]

2023-03-01 00:41 分类：问答
Calculation of accumulation area

I\'m looking for a GIS/Geometric algorithm: I have 1000 points randomly distributed in a large area(such as a city), How can I find out all the small ar开发者_C百科eas which have more than 15 points?[详细]

2023-02-28 23:22 分类：问答