Bug Report: Some transects have their origin and end point swapped

[2320sharon]

Some transects have their origin and end point swapped.

Description:
Users have reported that certain transects, especially those around Fire Island, don't have their origin set as the landward point. Instead, the origin is set seaward. We need to devise a method to identify which transects have their origin in the sea and then swap the points for those specific transects. After rectifying the transects, it's crucial to update the Zenodo release.

Steps to Reproduce:

1. Load the transects data for Fire Island.
2. Save the transects to geojson with the save to file button
3. Run the script get_transects_points.py located in coastseg/scripts with the transect geojson file generated in step 2
4. Load origin_points.geojson generated by step 3 into geojson.io
5. Observe that the origin points are located in the sea instead of landward

Expected Behavior:
All transects should have their origin as the landward point.

Actual Behavior:
Some transects have their origin set seaward.

Possible Solution:

1. Develop an algorithm or script to identify transects with seaward origins.
2. Swap the origin and end points for the identified transects.
3. Update the dataset and release it on Zenodo.

Additional Information:

• This issue might affect other regions as well, so a comprehensive check is recommended.
• Ensure that the updated dataset is thoroughly tested before releasing on Zenodo.

[2320sharon]

Here are some ideas we discussed in the Slack.

• This tool especially looks useful https://github.com/simonepri/is-sea and is it possible its simple enough to wrap with https://pypi.org/project/Js2Py/?

[2320sharon]

I've been working on analyzing our transects and fixing the transects that were in the wrong direction or were wrong.

The transects for Hawaii were in pretty bad shape and required quite a lot of cleaning. I'm posting them here before adding them to the next CoastSeg version.

Transects_grid_region_2_cleaned_version.zip

Remaining Tasks

• region 0 barter island AK, whole dataset needs to be swapped

• region 29 need to remove some transects

• needs a lot swapped starts at cape charles

• region 30 needs a LOT swapped

• all around puerto rico

• remove some around floria

[2320sharon]

Here is region 30 transects fixed

puerto_rico_fix_transects.zip
Transects_grid_region_30_swapped.zip

[2320sharon]

Alright region 29 was pretty easy
Just needed to swap one big group
region_29_fix_transects.zip
Transects_grid_region_29_swapped.zip

[2320sharon]

region 0 was the easiest I just had to run

python transects_swap_points.py  -i "C:\development\doodleverse\coastseg\CoastSeg\src\coastseg\transects\Transects_grid_region_0.geojson" -o "Transects_grid_region_0_swapped.geojson"

# bonus command to see the origin and end points
python get_transects_points.py  -i  "C:\development\doodleverse\coastseg\CoastSeg\scripts\Transects_grid_region_0_swapped.geojson"

Transects_grid_region_0_swapped.zip

[2320sharon]

These transects have been merged into main and all the transects are now facing the correct direction