Geo @ ObjectGraph

Earth and Environmental Science Blog

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Archive for January, 2011

I finished installing ArcGIS Server 10 and I also installed a few spatial relational database. I would like to show some examples in Microsoft SQL Server 2008. In this article, I’m showing a difference between Geography Data Type and Geometry Data Type. To begin this discussion, I prepared one table in a database: Table Name = Locations

  • LocationID int
  • Name varcha
  • LocationGeom geometry
  • LocationGeog geography

I just finished installing ArcGIS server 10 and I’m exciting about it… but wait a minute, the Manager page is not accessible after rebooting machine. Since I’m a .NET developer, it sounds familiar to me. The solution was re-enabling .NET 2.0 for IIS like below:

aspnet_regiis.exe -i -enable

The comments section of the documentation page says, 9 out of 10 this will work and I agree with it. In my environment, Windows Server 2003, above program is located at :

c:\Windows\Microsoft.NET\Framework\v2.0.50727

I hope this will help someone.

Documentation Page is here.

http://msdn.microsoft.com/en-us/library/k6h9cz8h(v=vs.80).aspx

Google Street View at Antarctica

I was browsing Google Maps today and I noticed that they merge buffers of Google Street View when you zoomed out. Then I tried to zoomed out to see how they covered all over the world.

Check this out!

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Introduction

The goal of this project is to visualize a specific WiFi SSID strength on a map. WiFi signal’s strength is affected by the distance from the antena or obstructions between the receiver and the antena. In this article, I collected data in a small shopping mall in Long Island. WiFi strength was measured on iPhone and the value will be directly sent along with coordinate information to Google Fusion Tables. After collecting data, analysts are able to create map on the fusion table itself or download it as csv to import in other GIS software, such as ArcGIS.

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