[Xastir] .tfw to .fdg conversion??

[Gerry Creager N5JXS]

I can't do it right now (I'm putting together an ad hoc class for a 
couple of computer science students on how to conduct a medical patient 
visit to a doctor, from the doc's perspective) but I guess it's time to 
do Datums and Projections 101 again...

I'll go thru the slides this weekend.  We can have the lecture next week 
before I leave on vacation, with some additional references.  The test 
will be upon my return.;-)

Gerry

Kirk Mefford wrote:
> At 11:21 PM 5/22/2003, Curt Mills, WE7U wrote:
> 
>> On Thu, 22 May 2003, Kirk Mefford wrote:
>>
>> > Since no one answered me on my last question I did some more digging.
>>
>> That means no-one knew the answer, or no-one has read it yet that does.
>>
>>
>> > I have a rather large image I want to use a map that was created with a
>> > ESRI worldfile ".tfw" file for the georeferencing information.  
>> Xastir I
>> > know doesn't support this format but does support Geotiff files with 
>> .fdg
>> > data files.
>>
>> Yes.  It also supports images as long as they have associated ".geo"
>> files and you have compiled in ImageMagick (most image formats) or
>> XPM (XPM format images).
> 
> 
> I am very aware of that.  That's why my first idea was to make a .geo 
> data file for the image, hence my first question.  I know the format of 
> .geo files and basically how they are made... I made a couple to 
> experiment earlier from a tigermap image.
> 
> I've found it somewhat difficult to get the calculation just right to 
> make the map line up with other maps though.  That's why I asked if 
> there was an easy way to extract or decode the data from the worldfile 
> data format either automatically or manually.  The worldfile data I have 
> to the image in question is for the upper left and lower right pixel but 
> I can't seem to understand how to pull a lat/lon from the worldfile data.
> 
> 
> 
> 
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-- 
Gerry Creager -- gerry.creager at tamu.edu
Network Engineering -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.847.8578
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