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Old 02-04-2012, 02:09   #1
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ArcGIS to OpenCPN

Hi all, first time posting here.

I have a very valuable (to me right now ;-) ) set of multi-beam bathymetric data in ArcGIS and I would very much like to display it in OpenCPN as a useful aid to near shore navigation around American Samoa. Unfortunately I've not had any luck figuring out how to output anything from ArcGIS that can be converted to a BSB or KAP format. In fact I can't seem to find anything that converts into a BSB format at all....

I'm sure this isn't something folks are doing every day, but are there any tips out there for how to get this ASCII or geoTIF or other GIS output data format into something a navigation program like OpenCPN can render?

V/R,
Justin Ellis
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Old 02-04-2012, 05:33   #2
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Re: ArcGIS to OpenCPN

I would contact the developer of this software and see if he can help you.
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Old 02-04-2012, 09:32   #3
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Re: ArcGIS to OpenCPN

jeellis2, not an ArcGIS user but geoTIF rings a bell. I've converted plenty of those to kaps...

you've probably been here tried this? for geotiffs? A good site...

A Basic Raster Image GeoMetaData Extractor/Viewer

to get the corner calibration points you can use in imgkap...or MapCal2 if that's your pref..
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Old 02-04-2012, 15:02   #4
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Re: ArcGIS to OpenCPN

Justin..
Here's a way to extract the corner co-ordinates of your geotif.tif files.
You need to download and install listgeo.exe
Use the command line listed in the attachmentto create the coordinates.

Convert your geotif.tif file to .png format with 126 colours using Gimp2.
Then use MapCal2 to convert the ,png image to a .kap file

All the mentioned progs. are free to download from internet.

Tore
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Old 02-04-2012, 17:30   #5
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Re: ArcGIS to OpenCPN

Help anybody!

Having managed to glean the required coordinates from a geotiff file,I do'nt know how to turn the pixel data at the bottom into TL TR BL and BR geo coordinates. And the scale,is it 1:1000000 ?
Any help gratefully accepted...

Quote:
Tagged_Information:
ModelTiepointTag (2,3):
0 0 0
-102681.725 161610.062 0
ModelPixelScaleTag (1,3):
250 250 0
End_Of_Tags.
Keyed_Information:
GTModelTypeGeoKey (Short,1): ModelTypeProjected
GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
GTCitationGeoKey (Ascii,62): "Generated by MultiSpecCarb_12.20.2007 on 06-09-2008 12:35:19"
GeographicTypeGeoKey (Short,1): User-Defined
GeogCitationGeoKey (Ascii,16): "Spherical Earth"
GeogGeodeticDatumGeoKey (Short,1): User-Defined
GeogPrimeMeridianGeoKey (Short,1): PM_Greenwich
GeogLinearUnitsGeoKey (Short,1): Linear_Meter
GeogAngularUnitsGeoKey (Short,1): Angular_Degree
GeogEllipsoidGeoKey (Short,1): Ellipse_Sphere
GeogSemiMajorAxisGeoKey (Double,1): 6378137
GeogSemiMinorAxisGeoKey (Double,1): 6378137
ProjectedCSTypeGeoKey (Short,1): User-Defined
ProjectionGeoKey (Short,1): User-Defined
ProjCoordTransGeoKey (Short,1): CT_TransverseMercator
ProjLinearUnitsGeoKey (Short,1): Linear_Meter
ProjNatOriginLongGeoKey (Double,1): -87
ProjNatOriginLatGeoKey (Double,1): 40.42
ProjFalseEastingGeoKey (Double,1): 0
ProjFalseNorthingGeoKey (Double,1): 0
ProjScaleAtNatOriginGeoKey (Double,1): 1
End_Of_Keys.
End_Of_Geotiff.

Projection Method: CT_TransverseMercator
ProjNatOriginLatGeoKey: 40.420000 ( 40d25'12.00"N)
ProjNatOriginLongGeoKey: -87.000000 ( 87d 0' 0.00"W)
ProjScaleAtNatOriginGeoKey: 1.000000
ProjFalseEastingGeoKey: 0.000000 m
ProjFalseNorthingGeoKey: 0.000000 m
Ellipsoid: 7035/(unknown) (6378137.00,6378137.00)
Prime Meridian: 8901/Greenwich (0.000000/ 0d 0' 0.00"E)
Projection Linear Units: 9001/metre (1.000000m)

Corner Coordinates:
Upper Left (-102681.725, 161610.062)
Lower Left (-102681.725,-313389.938)
Upper Right ( 207318.275, 161610.062)
Lower Right ( 207318.275,-313389.938)
Center ( 52318.275, -75889.938)
Tore
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Old 04-04-2012, 15:58   #6
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Re: ArcGIS to OpenCPN

Quote:
Originally Posted by jeellis2 View Post
Hi all, first time posting here.

I have a very valuable (to me right now ;-) ) set of multi-beam bathymetric data in ArcGIS and I would very much like to display it in OpenCPN as a useful aid to near shore navigation around American Samoa. Unfortunately I've not had any luck figuring out how to output anything from ArcGIS that can be converted to a BSB or KAP format. In fact I can't seem to find anything that converts into a BSB format at all....

I'm sure this isn't something folks are doing every day, but are there any tips out there for how to get this ASCII or geoTIF or other GIS output data format into something a navigation program like OpenCPN can render?

V/R,
Justin Ellis
Try the chart conversion pages on the OpenCPN site.

==> Chart Conversion | Official OpenCPN Homepage

Once you've looked around a bit, ask questions. There are several people in here versed in various areas of producing KAPs.

Of course, the better way would be to delve into the S57 chart standards and create vector charts from your data. But that would require just a wee bit more work...

-dan
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Old 04-04-2012, 16:11   #7
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Re: ArcGIS to OpenCPN

The first step, obtaining an image from shapefiles, can be helped by mapserver, which in console mode can create gif or png files. If you know ArcGIS, it can't be too hard to learn to configure mapserver .map files.

Once you have a gif file, it's easy to convert it ti tiff and follow the steps suggested before.
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Old 04-04-2012, 16:45   #8
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Re: ArcGIS to OpenCPN

Justin..

If you will email me one of your geotiff files I will see what I can do.

tore.christiansen()gmail.com

Tore
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Old 04-04-2012, 17:34   #9
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Re: ArcGIS to OpenCPN

Justin..

Here is the header of the bathymetric geotiff displayed below.

Quote:
Geotiff_Information:
Version: 1
Key_Revision: 1.0
Tagged_Information:
ModelTiepointTag (2,3):
0.5 0.5 0
2245376 1247861 0
ModelPixelScaleTag (1,3):
10 10 0
End_Of_Tags.
Keyed_Information:
GTModelTypeGeoKey (Short,1): ModelTypeProjected
GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
GeogGeodeticDatumGeoKey (Short,1): Datum_North_American_Datum_1983
GeogEllipsoidGeoKey (Short,1): Ellipse_WGS_84
ProjectedCSTypeGeoKey (Short,1): User-Defined
PCSCitationGeoKey (Ascii,25): "Lambert Conformal Conic""
ProjectionGeoKey (Short,1): User-Defined
ProjCoordTransGeoKey (Short,1): CT_LambertConfConic_2SP
ProjLinearUnitsGeoKey (Short,1): Linear_Meter
ProjStdParallel1GeoKey (Double,1): 70
ProjStdParallel2GeoKey (Double,1): 73
ProjNatOriginLongGeoKey (Double,1): -105
ProjNatOriginLatGeoKey (Double,1): 70
ProjFalseEastingGeoKey (Double,1): 3000000
ProjFalseNorthingGeoKey (Double,1): 1000000
End_Of_Keys.
End_Of_Geotiff.

Projection Method: CT_LambertConfConic_2SP
ProjFalseOriginLatGeoKey: 70.000000 ( 70d 0' 0.00"N)
ProjFalseOriginLongGeoKey: -105.000000 (105d 0' 0.00"W)
ProjStdParallel1GeoKey: 70.000000 ( 70d 0' 0.00"N)
ProjStdParallel2GeoKey: 73.000000 ( 73d 0' 0.00"N)
ProjFalseEastingGeoKey: 3000000.000000 m
ProjFalseNorthingGeoKey: 1000000.000000 m
Datum: 6269/North American Datum 1983
Ellipsoid: 7030/WGS 84 (6378137.00,6356752.31)
Projection Linear Units: 9001/metre (1.000000m)

Corner Coordinates:
Upper Left (2245371.000,1247866.000)
Lower Left (2245371.000,1229426.000)
Upper Right (2268721.000,1247866.000)
Lower Right (2268721.000,1229426.000)
Center (2257046.000,1238646.000)
These are just strips but shows the method of display.

Tore
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Old 06-04-2012, 16:41   #10
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Re: ArcGIS to OpenCPN

Unless further interest is shown,I conclude my contribution to this thread with a bathysphere fishing .kap map of West Florida which can be downloaded here: (76 MB)

Tore

P.S. It is a little skewed. The original geotiff was 330 MB
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Old 06-04-2012, 17:15   #11
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Re: ArcGIS to OpenCPN

Sorry, I seem to have forgotten the download link to the bathysphere file:
4shared folder - FLORIDA

Large file,76 MB.

Tore
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Old 07-04-2012, 07:15   #12
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Re: ArcGIS to OpenCPN

Justin..

Perhaps this bathys.. .kap file of the Hawaii Archipelago is of more interest to you? (33MB)

HAWAII ISLANDS-BATHY.kap - 4shared.com - online file sharing and storage - download

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Old 07-04-2012, 12:13   #13
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Re: ArcGIS to OpenCPN

Justin..

As I was saying,enough is enough,BUT,I couldn't resist this bathymetric .kap from Tutuila, which I believe is YOUR home waters?

http://www.4shared.com/file/9nuPJ13e/TUTUILA_5M-C.html

Tore
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Old 15-04-2012, 01:25   #14
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Re: ArcGIS to OpenCPN

fyi clean & geo-correct GRASS GIS -> OpenCPN is possible via a GRASS addon module (that just simplifies the prep work, you still have to run the tiff2bsb encoding manually to create the KAP file, if you are legally entitled to do so).

Arc -> GRASS is trivial.


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