MauiN_ST - Digital Shoreline Analysis System (DSAS) version 4.2 transects with short-term weighted linear regression rate calculations for the Maui North region from Waihee to Kuau, Hawaii.

Transect features were generated outside of DSAS and imported to DSAS v4.2 in ArcMap v9.3 for calculation of short-term shoreline change rates for the region. Transects are roughly perpendicular to the historical shorelines and spaced roughly 20 meters along the shore. Please see the DSAS help file distributed with the DSAS software, or visit the USGS website at: https://pubs.er.usgs.gov/publication/ofr20081278. This process step and all subsequent process steps were performed by the same person: Bradley Romine.

Rate Calculations Performed in DSAS v4.2 using ArcMap v9.3 on selected shoreline features, only (from 1960 to 2002). Additionaly, North Maui includes 86 transect locations where the beach was completely lost to erosion prior to 1960 (replaced by natural or artificial hard shoreline). As a result, all shoreline features at these transects are aligned and all shoreline intersects are equal - indicating no shoreline change (fixed shoreline position) after 1960. Due to a programming issue, DSAS v4.2 crashes when all shoreline intersects are equal. To allow for short-term rate calculations at these transects with DSAS, the shoreline feature class is further edited by removing all but the two most recent shoreline features at transect features where all shorelines are aligned (TransOrder 570, 601-606, 622-624, 627-641, 710-713, 750-752, 757-758, 769-773, 787-796, 800-802, 813-815, 830-832, 840-852, and 867-88). With the shoreline intersection threshold set at 3 (see following parameters used), DSAS will not calculate rates for these transects. After joining the rates table to the transect feature class (see the follow process step 3), the WLR 'null' rates and WCI95 uncertainty values at these transects are replaced with '0' indicating no change.
Parameters Used: shoreline layer=MauiN_shorelines, shoreline date field=DATE_, shoreline uncertainty field name=ACCURACY, the default accuracy=0 (accuracy values provided for all shorelines), shoreline intersection parameters=closest intersection, stats calculations=[weighted linear regression (WLR)], shoreline threshold=3, confidence interval=95%, Output rate table name=NMaui_transects_st_rates_20110715_150745.

Shoreline rates table (NMaui_transects_st_rates_20110715_150745.dbf) was joined to the transect feature class inwith ArcToolbox > Data Management Tools > Joins > Join Field. Parameters: input dataset: the transect feature class; join field - TransOrder; table to join - NMaui_transects_st_rates_20110715_150745; field in table: TransectID. This method permanently adds the selected attributes to the transect feature class. Following the join, WLR and WCI95 attributes at transects where the beach has been lost (null value = -1, see process step 2 for TransOrder transect numbers) are replaced with 0 - indicating fixed shoreline, no change.

The joined transect feature class was exported to a shapefile in ArcMap v9.3 by right-clicking the transect layer > data > export data.

The exported transect shapefile was projected in ESRI's ArcToolbox (v.9.3) > Data Management Tools > Projections and Transformations > Feature > Project. Parameters: input projection - UTM zone 4N (WGS 84); output projection - geographic coordinates (WGS84).

Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.

Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata.

Edits to the metadata were made to fix any errors that MP v 2.9.46 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Added a data landing page link as the first link in the identification section. Removed LIDAR bounding coordinates - an artifact of Esri and MP processing. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. Added additional information to a cross-reference and fixed the online link. Attempted to modify http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.

Added keywords section with USGS persistent identifier as theme keyword.