geospatial
Oracle SQL query or function to cluster geographic data
I have a table containing geographic data and I want to group rows on the proximity of the X and Y coordin开发者_如何学JAVAates. So, given an offset, n, and a table with columns X and Y, I want to gro[详细]
2023-02-18 01:29 分类:问答Finding the world center on blank SVG maps available on wikipedia
I need to plot geo locations (lat, lon) on svg maps just like it\'s done in this demo: http://people.opera.com/danield/svg/where-am-i.svg[详细]
2023-02-17 08:12 分类:问答Designing a normalize database for getting 5 nearest neighbor using MySQL spatial index
I will be using MySQL with spatial index for a database, then i will query for 5 nearest neighbors from a given point(lat/long), these points will be interest points in Dominican Republic. Once that i[详细]
2023-02-16 20:02 分类:问答Learn GIS with Python [closed]
Closed. This que开发者_StackOverflow中文版stion does not meet Stack Overflow guidelines. It is not currently accepting answers.[详细]
2023-02-16 07:20 分类:问答Why is the distance between Boulder and Philadelphia is 7 miles? Am I doing my math wrong?
This is the lat/long for Philadelphia: http://www.rcn.montana.edu/resources/tools/coordinates.aspx?nav=11&c=DD&md=24&mdt=Internationa开发者_开发问答l(1924)-Hayford(1909)&lat=39.947648&[详细]
2023-02-15 05:47 分类:问答How to find the average of a set of bearings [duplicate]
This question already has answers here: Closed 11 years ago. Possible Duplicate: How do you calculate the a开发者_如何学Cverage of a set of angles?[详细]
2023-02-14 22:14 分类:问答Saving and restoring geometries in OpenLayers
Context: I\'m a just-hours-old newbie at OpenLayers, please be gentle. Fundamentally, I have a map with some drawn objects on it.If I understand things correctly, I have a number of OpenLayer.Feature[详细]
2023-02-14 14:14 分类:问答GIS systems, Rundown of advantages
First word of warning, I believe this is a stackoverflow rather than programmers question, Mods feel free to move it if i\'m wrong.[详细]
2023-02-13 23:05 分类:问答SQL Server 2008 approximating .STWithin() on a Geography data column
I am using SQL 2008 Geography datatype for a project that deals with mapping out some areas.I need to check to make sure a smaller area is fully within the bounds of a larger area.With the Geometry da[详细]
2023-02-13 12:16 分类:问答For a multiline intersecting several polygons, get the respective lengths
I have one table containing polygons and another containing multilines. For a given multiline, I can get just the intersecting polygons, like so:[详细]
2023-02-13 08:56 分类:问答