CoastSat 2.0

CoastSat 2.0 MAJOR update:

• New download and preprocess functions for Landsat images: this improvement provides better alignment between panchromatic and multispectral bands and fixes an occasional issue of a shift between L5 and L7/L8 in the resulting shoreline time-series. Note that the Sentinel-2 download and preprocessing remains exactly the same, but should be updated too eventually (I did not have time). Changes to SDS_download.py and SDS_preprocess.py were made.
• New quality-control functions: to help with a fully automated shoreline extraction, including:
  • improved automated shoreline mapping when the manual quality-control parameters (check_detection and adjust_detection) are turned off. Changes to SDS_shoreline.py were made.
  • enhanced functionalities to compute the intersections (dealing with loops, multiple intersections etc), new function SDS_transects.compute_intersections_QC().
• New post-processing functions: includes a despiking algorithm SDS_transects.reject_outliers() for the shoreline time-series and functions to compute seasonal and monthly averages, SDS_transects.seasonal_averages() and SDS_transects.monthly_averages().
• Easier way to install the environment suggested by @YonniYe in #278.

CoastSat v1.2

Updates from previous release:

• Compatibility with Landsat 9 imagery
• Users can choose whether to use Landsat Collection 1 or the newly released Collection 2 (note that Google Earth Engine are still uploading Collection 2 to their servers). Images after 2022/01/01 are only available in Collection 2.
• More bug fixes from @2320sharon on merging Sentinel-2 images that overlap in the region of interest
• New installation instructions (without the environment.yml file)

CoastSat v1.1.2

minor bugfix as Inf values were crashing the classifier

CoastSat v1.1.1

Bugfix when merging overlapping S2 images in SDS_download.py

CoastSat v1.1

New functionality that allows users to plot the histogram of MNDWI pixel intensities and adjust the threshold that is used for shoreline detection as show below:

this functionality can be activated by setting adjust_detection to True (default value set to False).

CoastSat v1.0.5

minor bug fixes (based on reported issues) related to the handling of cloud cover with the new earthengine api version

CoastSat v1.0.4

• fixed the issue with merging overlapping S2 images for version of the earthengine-api > 0.1.201, it now works with all versions.

CoastSat v1.0.3

• Added a section on tidal correction using tide levels at the time of image acquisition and an estimate of the beach-face slope.
• there is still an issue with merging overlapping Sentinel-2 images with versions of earthengine-api > 0.1.201 (for earlier versions it works fine)

CoastSat v1.0.2

Changes from previous release:

• updates to download function
• updates to the way the outputs are saved:
  • geojson file containing the shorelines is saved as a multipoint instead of linestring
  • a new .csv with the time-series of shoreline change along the transects
  • some new functions to filter out duplicates and images with inaccurate georeferencing

CoastSat v1.0.1

Changes from previous release:

• new functions to label images and train your own image classifier in the \classification folder