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DeveloperPermalink Reply by Michael Oborne on July 1, 2011 at 1:43am

I have thought of this, maybe wms and ecw's but not sure yet. Also apm planner caches GE images

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Permalink Reply by James on July 1, 2011 at 1:57am

Thanks Michael,

Yes WMS are very popular and most countries have their own high quality orthophoto wms service, but still we need internet conection on the field to use them.
The GE Cashed version is always in medium quality and with a lots of error (im from Greece, usual errors exced 15 meters).
So what about already georeferenced Tiffs, imgs etc.... like topografik maps, aerial images with below 0,2 m pixel!! without the need of internet conection? theres alot of opensource GIS servises like POSTGIS, i assume programming geniuses here can find a way to combine them...

I just recieved mine APM, so i will try to find a possible way, like: overlay a high quality wms servise in my GE, level up the cashe size at home, then go out...

(i just reread what i write and my english sucks!!)

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DeveloperPermalink Reply by Michael Oborne on July 1, 2011 at 4:13am

if you look in the planner screen you will see a prefetch button. and can prefetch an entire area, all zoom levels.

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Permalink Reply by Jani on July 1, 2011 at 6:07am

I like to see georeferenced raster images support also. I prefer direct support for Oziexplorer maps as they are working also in mobile phone platform and many other pc software than ozi. There's also tons of converting tools for raster maps and the exact support for any filetype is not important.

 

Other idea came in mind also:

Maybe Mission Planner can parse gps nmea data from usb/telemetry mavlink data and send it to virtual com port. Then we can use external softwares to show "live gps tracking" like Ozi's MovingMap.

 

-Jani-

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Permalink Reply by James on July 1, 2011 at 6:29am

Exacly Jani, thats the thing a had in mind, and thanks Michael for the prefetch tool,
As for the idea, its great because there are a lot of sub meter maps for ozi , or even we can use telemetry data like compass, center point of image and scale, and georeference emediatetly new aero-photos in any format.

thats way off topic but it will trigger some masterminds... ArcGIS etc can comunicate with Total Stations, Arcpads etc for geocashe, maybe we can "trick" the GIS software (ozi for starters), to see ARM as Total Station and gather realtime GIS data.

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DeveloperPermalink Reply by Michael Oborne on July 1, 2011 at 6:43pm

can one of you guys give me a url to a small ozi map? my 6gb ecw at 0.1m is a little to big

as for sending out nmea to a virtual com, that is the easy part. but wont aim there yet.

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DeveloperPermalink Reply by Michael Oborne on July 1, 2011 at 7:28pm

ok been investergating. using globalmapper i can export google earth tiles. so now its just in injecting them into the database... and done.

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Permalink Reply by Jani on July 2, 2011 at 6:21am

Great! I also tried Globalmapper and kml/kmz tile and compressed file export works nicely with GE .

If you still want to look ozi map files i uploaded one sample map from Helsinki :) Just take a look the .map file which is calibration data for png image. Sample mapscale is 1:2000

I'm not expert with geareferencing, but i think handling most used map datums and coordinate/grid systems is not easy, supporting GE is good way to go at this point.

 

So you can do relative easy support for kml/kmz files ?

 

Jani

 

Attachments:

• Helsinki_demo_Aerial.map, 2 KB
• Helsinki_demo_Aerial.png, 1.3 MB

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Permalink Reply by James on July 2, 2011 at 6:47am

So, as for the first part (good backround on the field) we have many solutions.

As for the georeferenced images, i should mention that: OZI map files have a catch, they use only first order polyonimal to georefernce a map or image- 3 point correction, (usually, we need  2nd-3rd or even spline), also OZI dosent support pyramids so its difficult to load high quality aerophotos. Thats why ArcGIS,ERDAS,QUANTUM etc, use the image file ***.jpg, the georeference file ***. jgw & ***.jpg.aux.xml & pyrammid file ***.rrd.

 

As for the datum, everything must be projected to WGS84 datum (GE and GPS receivers) Global mapper for example does that seamlessly, when we download USGS satellite images (utm) converts them to WGS 84, also in to take foul advantage of the pre fetch tool of APM or G.MAPPER tile you have to own a pro GE licence for the 0,20 m pixel accuracy.

Thats were my knowledge stop ( if anybody wants me to upload a georefernced image to play with, i ll be happy to help a little to this).

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DeveloperPermalink Reply by Michael Oborne on July 2, 2011 at 7:22am

I already have something working in conjunction with global mapper I will release tommorrow

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DeveloperPermalink Reply by Michael Oborne on July 2, 2011 at 8:47pm

ok heres a quick guide, using globalmapper.

 

1. load image into globalmaper, make sure projection is correct.

2. goto file> export web format

3. pick google maps tiles

4. now the max zoom i zoom to is usualy 17/18, so i would suggest from 10 to 17-18
5. export as png.

6. define your area.. it does take a while on the file i wqas using to test 0.2m per pixel. so be warned

7. run it.

 

now once thats all done.

in apm planner press

control-F

click inject ge into database

pick the base directory of all the exported globalmapper tiles. ie pick the html file, directory.

wait for it....... it takes quite some time for large sets.

in the planner screen pick map type as "Custom"

 

then it should be working. not if you dont upload layers 3-10, you will need to zoom in beforehand, as there is no images at this level otherwise.

I will probly revise this into the future, but at the moment this is working, so will leave it as that.

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Permalink Reply by Jani on July 3, 2011 at 12:49pm

After little hassle it works! Have to stay big thx, this is definetly one step further, now we have one way to use diy maps...great!

Just wondering about the Data.gmdb file size after inject. I made with globalmapper a folder containing 243megs of tiles with zoom levesl from 15 to 17 and after injection Data.gmdb was over 1gig bigger?? Not a big deal, i just have to clean my old thinkpad hdd before adding big maps there :P

 

Only way to delete diy maps from database is to destroy Data.gmdb file?

 

-Jani-

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