[Geowanking] Mapping Burning Man

[Mark Lucas]

Just to point out, OSSIM ( www.ossim.org ) supports ortho- 
rectification, precision terrain correction, and full blown sensor  
models if you have all of the calibration data.  For coarse stuff,  
you can just take an acquired image and warp it with control points  
which can be either GPS points or tie points to an already geo- 
rectified image or map.

One of the best sensors thatw we have worked with lately is the  
Applanix/Emerge system.  The metadata is dead on and we already have  
that sensor model built into the OSSIM baseline.  Basically the same  
sensor that was used by NOAA after Katrina.  The cameras and  
positioning systems are designed to be put in planes.  Typically,  
they will rent or contract with a plane in the local area and send  
the sensor platform out for the mission.

Really good resolution and quality, but probably fairly expensive.

www.applanix.com

Might be able to contact them and see who has acquired their systems  
in the area that you want to fly.

Mark Lucas


On Jun 21, 2006, at 2:07 PM, Marc Pfister wrote:

>
> Mike Cattle wrote:
>
>> I use Global Mapper as a fairly inexpensive tool for a lot of my
> mapping
>> needs.  While I haven't done any image rectification with it, it does
> have
>> that feature.  (http://www.globalmapper.com/)
>
> Global mapper does have a nice rectification interface (it's a great
> program - the Swiss Army knife of GIS). However there's a difference
> between rectification (where the image is warped to best fit control
> points), and orthorectification (where the camera's orientation is
> calculated based on control points or sensor models, and then the  
> image
> is reconstructed pixel-by-pixel as each pixel's 3d location is
> calculated based on it's position in the field of view and the
> corresponding elevation from a DEM surface model). The latter is much
> more accurate, and given the camera parameters even lens distortion  
> can
> be removed. On something flat like the Playa standard rectification
> should be good enough though.
>
>
>> But yes, you'd want to set up some sort of rig that can get the  
>> camera
>> pointing straight down.
>
> I remember seeing some sort of self-contained airphoto rig that  
> could be
> clamp to the door of most small planes. I think you could rent it. Or
> maybe they were selling it, with the idea that the purchaser would  
> rent
> it out.
>
> I'll dig around and see if I can find it.
>
>
>
>
> Marc Pfister
> Geospatial Data Manager
> ENPLAN
> mpfister at enplan.com
> 530/221-0440 x108
> 530/221-6963 Fax
>
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-------------------
Mark Lucas



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-------------------
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