[postgis-users] How do I create a georeferenced tiff file...

[Paul Ramsey]

Mapserver will render an appropriate image given the spatial extents and 
image size you have requested. If you want more resolution for a 
particular extent, increase your requested image size. Output images are 
static, if you want a dynamic image, use a ... mapserver. :)

Zamil Murji wrote:

> Thanks Paul,
> 
> Neat trick. I'll try it out this weekend. One other thing, let's say
> I do create a georeferenced tiff, if my points look like a clump of
> black dots when zoomed out and then I zoom in will mapserver know
> that I've zoomed in and try to spread the pixels apart? So what I
> don't want is a static image: I zoom in and it is still a clump of
> black dots.
> 
> Thanks Zamil
> 
> -----Original Message----- From:
> postgis-users-bounces at postgis.refractions.net 
> [mailto:postgis-users-bounces at postgis.refractions.net]On Behalf Of
> Paul Ramsey Sent: Thursday, May 27, 2004 3:28 PM To: PostGIS Users
> Discussion Subject: Re: [postgis-users] How do I create a
> georeferenced tiff file...
> 
> 
> 
> Free your mind, and the rest will follow...
> 
> Every image you create with mapserver is georeferenced by nature.
> When you ask mapserver for an image with a particular extent, that
> image is georeferenced -- it is an image and it has the spatial
> extents you asked for. Throw the extents into a world file and voila,
> instant georeferenced image. Write a script that hits mapserver with
> a request, writes a world file to disk, and writes the returned image
> to disk. Voila, georeferenced images. If you want TIFF (or any other
> supported gdal format) as your image format, you can use the
> OUTPUTFORMAT clause in your mapfile. See the mapserver reference docs
> for more information on that.
> 
> Paul
> 
> Zamil Murji wrote:
> 
> 
>> Hi Paul,
>> 
>> Do you have an example of how to do this? I've only ever used 
>> mapserver to create png and jpeg, but never used it to create a 
>> georeferenced tiff. In fact, I didn't even know mapserver could do 
>> such a thing (thanks for the insight).
>> 
>> Thanks Zamil
>> 
>> -----Original Message----- From: 
>> postgis-users-bounces at postgis.refractions.net 
>> [mailto:postgis-users-bounces at postgis.refractions.net]On Behalf Of 
>> Paul Ramsey Sent: Thursday, May 27, 2004 2:45 PM To: PostGIS Users 
>> Discussion Subject: Re: [postgis-users] How do I create a 
>> georeferenced tiff file...
>> 
>> 
>> Use mapserver with the new GDAL outputformat support to write out 
>> TIFFs.
>> 
>> Zamil Murji wrote:
>> 
>> 
>> 
>>> Hello list,
>>> 
>>> I've got a postgis table with approximately 500000 rows. I would 
>>> like to extract that data at various scales into georeferenced
>>> tiff images. How do I do this? What programs can I use?
>>> 
>>> Thanks for your help, Zamil 
>>> _______________________________________________ postgis-users 
>>> mailing list postgis-users at postgis.refractions.net 
>>> http://postgis.refractions.net/mailman/listinfo/postgis-users
>> 
>> 
>> 
> 
> 


-- 
       __
      /
      | Paul Ramsey
      | Refractions Research
      | Email: pramsey at refractions.net
      | Phone: (250) 885-0632
      \_