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chaddy · 11-03-2020, 06:06

Hi Everyone, new member here.

I am designing a GPS based data logger for when I scuba dive. This device sits on my dive flag and will record where I've traveled. This has practical uses for Search and Rescue and other means for underwater navigation/searching.

My arduino based device is a web server that can be accessed by any phone via the web browser. Unfortunately, I need a format in a typical web-based format such as map tiles (similar to google or leafletjs). My server requires them to be in a {zoom}/{x}/{y}.png format.

I got it working using OSM data to PNG but need to do the same for the formats NOAA offers and their nautical charts are a bit more 'related' than street maps

The formats that I can find are KAP/BSB and KML. I have a converter that will convert OSM data to PNG tilesets the way I need. But not sure how to get the KAP/BSB or KML files to that format.

I've scoured the internet for a few days now, and possibly just searching on the wrong terms, but any help would be amazing! and I'll greatly appreciate it.

thanks again for any support!
Chad

chaddy · 11-03-2020, 06:38

And after i post, i came across a solution, as always...

https://github.com/mapbox/mbutil

convert from MBtiles to PNG!

Rasbats · 11-03-2020, 10:47

Chad ...

Have you looked at Global Mapper?

Mike

chaddy · 11-03-2020, 10:56

Quote:

Originally Posted by Rasbats

Chad ...

Have you looked at Global Mapper?

Mike

its $220+ :-(

BlackSea · 11-03-2020, 11:34

Download MBTiles from NOAA
https://tileservice.charts.noaa.gov/tileset.html#50000_1-locator

clone from GitHUB https://github.com/mapbox/mbutil

cd mbutil

./mb-util your.mbtiles path_to_tiles_directory

chaddy · 11-03-2020, 11:45

Quote:

Originally Posted by BlackSea

Download MBTiles from NOAA
https://tileservice.charts.noaa.gov/...0000_1-locator

clone from GitHUB https://github.com/mapbox/mbutil

cd mbutil

./mb-util your.mbtiles path_to_tiles_directory

Thanks BlackSea, I have found that. It works (for the most part). Mbutil doesn't produce great outputs. Anything for ENC (s57 format)?

bcn · 11-03-2020, 11:46

Quote:

Originally Posted by BlackSea

Download MBTiles from NOAA
https://tileservice.charts.noaa.gov/...0000_1-locator

clone from GitHUB https://github.com/mapbox/mbutil

cd mbutil

./mb-util your.mbtiles path_to_tiles_directory

Chad..

mbTiles do work in OpenCPN - in case this was not clear.

If you have geo-refs ready for png chartlets, then imgkap is the tool to produce .kap files from images.

Both are valid options.

Dsanduril · 11-03-2020, 11:59

Around here we're always trying to go the other direction

But, I've had need in the past for what you are attempting, try BSB Reader and see if it produces what you need.

May also want to check out http://libbsb.sourceforge.net/.

Anything that counts on the raster products will get broken shortly when NOAA stops producing them, so you may be better off going down the ENC route, but I haven't had to do conversions your direction so don't have any recommendations for that.

chaddy · 11-03-2020, 12:07

Quote:

Originally Posted by bcn

Chad..

mbTiles do work in OpenCPN - in case this was not clear.

If you have geo-refs ready for png chartlets, then imgkap is the tool to produce .kap files from images.

Both are valid options.

hi BCN,

Not sure if I understand or if you missed my requirements?

I need the files exported into a png format similar to how web-map based systems work. I can export OSM and MBTiles into the correct format. Hoping to find something similar to ENC file format (vector format) and export similarly into {zoom level}/{x}/{y}.png in all levels from zoom level 1 to 20.
I need them exported to pngs because I am running this in an offline mode situation (no internet/server).