I'm struggling with this...
I have numerous images captured through side-scan sonar which are apparently georeferenced. I was trying to mapiinsert them, after setting a coordinate system, but can't seem to find the right coordinate system to put them in the right spot (i.e. at real world coordinates). The world file with should be WGS84 lat longs with coodinates as decimal degrees.
Could someone have a look and suggest a workflow?
I've attached all the files relating to one of the images.
Thanks
- Mick
Solved! Go to Solution.
Solved by antoniovinci. Go to Solution.
Solved by antoniovinci. Go to Solution.
First of all, please tell us: are we talking about a point on the south of Brisbane?
If so, try to _MAPIINSERT the attachment, and let us know what's goin' on, sir.
That attachment works perfectly Antonio. The location is south of Brisbane as you have plotted.
How did you achieve that?
Also, is there a setting that will remove the black infill around the skewed image. I actually have about 50 of these images that are a continuous series that should display seamlessly together.
Thanks
- Mick
The transformation of a "stupid" pair PNG/PGW into a "clever" GeoTIFF involves the following steps:
About the 50 unnecessary frames, I don't know any automatic ways to get rid of 'em, so I fear you should run (50 times) the _IMAGECLIP command in Autocad, sir.
Thanks Antonio,
OK so quite a process then, I thought I was just missing something with mapcsassign or similar.
I looked at imageclip, but it looks like it only does rectangular clip? Slow process as well.
Maybe there is a way to make the black frame transparent in the image?
thanks
- Mick
autoMick wrote:Maybe there is a way to make the black frame transparent in the image?
Good point, sir: load the attachment as usual, then set TRANSPARENCY=YES in its properties.
If it works, the only difference among skennars_head.tif is the alpha channel on the 0 value of band #4.
P.S.
If you wanna get info about the powerful opensource Qgis, surf the Tube which contains a lot of tutorials about.
Thanks Antonio, I've got a bit of learning to do!
- Mick
You're welcome, dear Aussie: by the way, set _IMAGEFRAME = 0 in order to hide the raster boundary.