ChartPlotter

Python library to render NOAA charts

Install

Install GDAL: https://mothergeo-py.readthedocs.io/en/latest/development/how-to/gdal-ubuntu-pkg.html

sudo add-apt-repository ppa:ubuntugis/ppa && sudo apt-get update
sudo apt update
sudo apt install gdal-bin
sudo apt install libgdal-dev
export CPLUS_INCLUDE_PATH=/usr/include/gdal
export C_INCLUDE_PATH=/usr/include/gdal
pip3 install GDAL

sudo apt install python3-gdal also seems to work

Also requires NavPY and shapely

Charts:

I use the NOAA vector charts, because they are dropping support for all else. I download the zip from their website, and put the folder in ENC_ROOT into a folder called ChartPlotter/charts/noaa.

Description

ChartPlotter.py is the core piece of code currently. It will rasterize the chart and output a OpenCV style image (numpy array). This system is supposed to be modular and support more than NOAA charts, so I'm structuring everything in layers. NOAA charts are currently the only layer, but I'm planning on adding USGS topo maps, and maybe some satellite imagery. The classes that render a specific layer live in the ChartLayers folder.

Extra test code

Currently, test4.py is my development script. It rasterizes the charts and saves each layer as a .tiff.

Example image:

Generated by the test/chart_plotter_test.py script

Reference layers from Woods Hole Passage

These are specific to the NOAA US5MA28M chart.

The meanings I've figured out:

• 4: Bridges
• 5: Buildings
• 7: Buoys
• 12: Edges
• 13: Towers on rocks in woods hole
• 14: Depth areas
• 15: Depth contours
• 16: Channels (Dredging)
• 17: Channels v2
• 21: Land
• 23: Marsh
• 29: Shallow, near shore stuff
• 33: Channels
• 34: Water
• 36: Shallow stuff v2
• 39: Rocky edges?
• 41: Depth soundings
• 42: Rocks

The complete list of descriptions as parsed by gdal/ogr

0 DSID
1 ACHARE
2 BCNLAT
3 BCNSPP
4 BRIDGE
5 BUISGL
6 BUAARE
7 BOYLAT
8 BOYSPP
9 CBLARE
10 CTNARE
11 CGUSTA
12 COALNE
13 DAYMAR
14 DEPARE
15 DEPCNT
16 DRGARE
17 FAIRWY
18 FOGSIG
19 HRBFAC
20 LAKARE
21 LNDARE
22 LNDELV
23 LNDRGN
24 LNDMRK
25 LIGHTS
26 MAGVAR
27 MORFAC
28 NAVLNE
29 OBSTRN
30 PILPNT
31 PIPSOL
32 PONTON
33 RECTRC
34 RESARE
35 RIVERS
36 SNDWAV
37 SEAARE
38 SBDARE
39 SLCONS
40 SILTNK
41 SOUNDG
42 UWTROC
43 VEGATN
44 WEDKLP
45 WRECKS
46 M_COVR
47 M_NPUB
48 M_NSYS
49 M_QUAL
50 C_AGGR