Map Projections

When displaying geospatial data you’ve got some decisions to make about what map projection to use.  One way to look at it is this: the world isn’t flat.  I know that isn’t news in the 21’st century, but that does turn out to be the problem.  The world isn’t flat, but the map is.  There…

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Transforming Map Data for Display

Now that we’ve got some map data it would be great to actually display it.  But that still isn’t an easy job.  The problem is that we’ve got two wildly different coordinate systems.  For the map data, we’ve got degrees latitude and degrees longitude and for our display surface we’ve got window coordinates with the…

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Getting geospatial data from shapefiles #2

In my last post we were able to read the header.  This time, we’ll actually drill in and get some actual map data.  To start reading the individual records in the file we’ll need some more data structures. All of the shape records in the spec appear to have this form:       // Copyright…

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Getting geospatial data from shapefiles

There are lots of digital map files available from the Government.  And in the case of the national atlas the data is stored in shape files.  And, as luck with have it, shape files are easy to read. The ESRI Shapefile Technical Description is easy to find and download.   The shapefile I’m using is statesp020.tar.gz. …

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Blogging Again

It’s been more than 5 years since I wrote something in my blog. But it is about time to get back to it.  One of the things I’ve been playing with off and on in my spare time is location data.  This has been a long time interest.  As a matter of fact before I…

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Windows Media Connect doesn’t share my files from a network share

So, all of the issues from the previous post apply here.  The file must be the right type, have the right permissions, and be parsed.  However, there are a couple of different things to consider that are unique to network shares.  There are a couple of ways that you can get access to data on…

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Windows Media Connect can’t see my files

I’ll cover the common causes for Windows Media Connect (WMC) not exposing a file.  I’m going to limit the information today to files that are on the same computer as WMC.  I’ll cover network shares in another post.  There are three common reasons why WMC won’t expose a file.  The file format isn’t supported The…

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My Digital Media Receiver can’t see Windows Media Connect

You’ve got everything hooked up and Windows Media Connect (WMC) can see your Digital Media Receiver (DMR) but your DMR can’t see WMC. This one is very interesting.  Let’s take a look at what could cause this problem.   When the DMR wants to find WMC (or vice versa) it sends out an SSDP MSEARCH…

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Windows Media Connect and Domains

A surprising number of people are running domains in their homes.  Windows Media Connect (WMC) can work on a domain joined PC.  Nearly every computer at Microsoft is joined to one of the corporate domains.  That was true of me as well as I worked on WMC. So, I daily streamed music from a domain…

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Windows Media Connect can’t see my DMR: IV

You’ve been trying to get it to work but Windows Media Connect (WMC) doesn’t see your device, and neither does the UPnP Subsystem.  We figured that out by running the script pasted to the blog a few entries back.  What could be causing this?  Let’s get past a few basic questions before we get usual…

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