Catamaran Cruising

<br>once you have put all the calibration points in you can use as many as you need to take out photo distortion.
Then you activate the grid .  If all the chart info is input Yoo can save the calibration.
Which creates a file in the same folder call CHARTCAL.DIR .

Activated grid saved
I will go through the process and then say where to get the little programmes .

Using the windows command prompt you run first mc2bsbh. Makechart2bsbheader  this changes the DIR text file into a header for the chart. Then you run  imgkap.
Which adds the photo image PNG file to the calibration header file and produces the chart. ( stmalo.kap) which you transfer to the chart folders of opencpn..

Screenshot of process.

This is a screenshot of the chart loaded into opencpn showing SVG charts with the border of the stmalo raster chart

Switch to raster display and the created photo chart is now in place note the latitude and longitude line up exactly and then 2 screens of close up of SVG and just created raster photo showing bouys position lining up.

The 3 programs link together to the folder .
And say you divide a large chart into 12 and photo each section with slightly overlapped borders all saved into one folder mapcap2 Will append each of the 12 calibrations into one CHARTCAL.DIR.  then 1 run of mc2bsbh will produce 12 chart headers and imgkap will produce all 12 quilted charts which will act seamlessly as you sail a route across.&nbsp;<div><br><div><br></div><div><br></div><div><br></div><div>Google maps  down in the same place and .

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