Ocean Disposal Sites

ground condition

Approach_Dumping_Ground_(Point/Area)

Coastal_Dumping_Ground_(Point/Area)

General_Dumping_Ground_(Point/Area)

Harbour_Dumping_Ground_(Point/Area)

Overview_Dumping_Ground_(Point/Area)

Unexploded Ordnance in United States Waters. Some features in this dataset overlap with the Ocean Disposal Sites dataset.

Unexploded Ordnance in United States Waters. Some features in this dataset overlap with the Ocean Disposal Sites dataset.

Convert point feature class to a new polygon feature class (CFRdata) by connecting the corner coordinates and joining in the attribute information.

Remove superfluous attributes as needed and crosswalk existing attributes to match the final schema, which was copied from MC.gov with 3 changes. An attribute was added for UXO feature duplication. The RasterChart attribute was changed to Source, and the Type attribute was changed to PrimaryUse.

Add the EPA regions layer. Use Select by Location to select all the sites falling within EPA Region One. Use the field calculator to populate the US EPA Region field. Repeat for all EPA regions.

Compare the Ocean Disposal Sites feature class to the UXO feature classes looking for duplicates and omissions. Features appearing in both layers were attributed as such in the UXOdup field of the ODS feature class. Features found in the ODS dataset that had a name or descriptive attribute indicating it also belonged in the UXO dataset were copied into a new feature class for later appending.

Export the appropriate features from USACE Placement Areas via Select by Attributes, where 'Placementtype' = OCEAN. Project into Web Mercator for comparison to Seamless RNC.

Compare the ENC features to one another and to the Seamless RNC images. Delete duplicates (keeping the feature collected at the largest scale). Convert the ENC point features to ENCpoly by tracing around the area depicted on the appropriate RNC at the ENCpoint feature.

Import excel spreadsheet into ArcMap as a table. Convert to x,y coordinates using the x/y event layer tool. Export as a point feature class.

Download all ENC Direct layers and merge into 2 feature classes (ENCpoint and ENCpoly). Project both into Web Mercator for comparison to Seamless RNC.

Project features originally recorded in NAD27 into NAD83 and replace in CFRdata. Then, project CFR data into Web Mercator for comparison to Seamless RNC.

Merge all the source datasets together and reproject into World Mercator.

Compare the source layers to the Seamless RNC and look for duplicate features by utilizing a topology to identifying overlaps. When eliminating duplicates, preference should be given to the feature that is most recent, most closely matches the Seamless RNC, and/or has the greatest amount of supporting data. Consideration should also be given to the sources of the features. Features from the CFR should be given precedence, then those from ENC Direct, then the USACE Placement Areas, and lastly, the MC.gov dataset. Features appearing only in the MC.gov dataset were considered outdated and omitted from the final dataset. Duplicates were identified by examining the geographic extent and several key attributes of neighboring features. These key attributes included name, source date, source and primary use.

Calculate the area of all features without a pre-populated size attribute via calculate geometry.

Compare MC.gov dataset with 40 CFR 228.15 by matching the name, size and general location of each disposal site. Transfer relevant information for changed/added/updated sites to an excel spreadsheet.