COAST COVERAGE INFORMATION
| Coverage Type vector |
|
Topology POLY,ARC |
| Extent coastwide |
|
Order by 1:24,000 scale quad |
| Sources |
US Geological Survey |
| |
Office of Geographic Information |
| |
|
COAST contains statewide coastal features in Maine. Some New
Hampshire and New Brunswick coastlines are also included. Data
for this coverage were digitized from the Mean High Water (MHW)
line as shown on USGS 1:24,000 scale quadrangle maps. In addition,
tidal rivers and ponds are also included in this coverage. The
extent of tidal features was determined by a group of marine
specialists familiar with Maine's coast. For rivers where the
tidal extent was unclear the first contour or bridge crossing the
river was used. Features which may be tidal but were connected to
the coast by single line streams are not included in the coverage
at this time. Codes for marine, tidal, and island polygons have
been added. In addition, students at the College of the Atlantic
attached Maine State Planning Office Coastal Island Registry
Numbers (CIREG) to island polygons. Arcs contain codes describing
coastline type, such as MHW, contour, or river mouth closure line.
All 121 coastal quads are available at this time.
 |
COAST CODING SHEET |
|
ARC Coding
| Codes |
|
Description |
| CHECK |
|
Item used in QA/QC |
| |
|
|
| |
|
|
| CLOSURE |
|
Closure line types (Items marked by * are not
completely coded at this time.) |
| 1 |
|
Fresh / estuarine* |
| |
|
|
| 12 |
|
12 mile limit* |
| |
|
|
| 2 |
|
Estuarine / marine* |
| |
|
|
| 3 |
|
3 mile limit |
| |
|
|
| 4 |
|
River mouth |
| |
|
|
| COAST |
|
Coastline type |
| 1 |
|
Mean High Water (USGS) |
| |
|
|
| 2 |
|
Causeway |
| |
|
|
| 3 |
|
Contour |
| |
|
|
| 4 |
|
Dam |
| |
|
|
| 5 |
|
Bridge |
| |
|
|
| 6 |
|
Other |
| |
|
|
| ISLAND |
|
Identifies island shorelines |
| 0 |
|
Non-island arc |
| |
|
|
| 1 |
|
Island arc |
| |
|
|
| LOCAL |
|
State or province location of line |
| 1 |
|
Maine |
| |
|
|
| 2 |
|
New Hampshire |
| |
|
|
| 3 |
|
New Brunswick |
| |
|
|
| TYPE |
|
Identifies line type |
| 0 |
|
Closure lines |
| |
|
|
| 1 |
|
Mainland arcs |
| |
|
|
| 2 |
|
Island arcs |
| |
|
|
POLY Coding
| Codes |
|
Description |
| CIREG |
|
Coastal Island Registry Number (A value of NO CIR
indicates no number has been assigned at this time.) |
| |
|
|
| |
|
|
| CLASS |
|
Same as source |
| |
|
|
| |
|
|
| LOCAL |
|
State or province location of polygon |
| 1 |
|
Maine |
| |
|
|
| 2 |
|
New Hampshire |
| |
|
|
| 3 |
|
New Brunswick |
| |
|
|
| RIVER |
|
Identifies tidal rivers |
| 0 |
|
Non-river polygon |
| |
|
|
| 1 |
|
River polygon |
| |
|
|
| SOURCE |
|
Source for feature digitized (mainly identifies
islands not shown on USGS 1:24,000 scale quads) |
| B |
|
OGIS digital files |
| |
|
|
| N |
|
Islands not shown on USGS quads |
| |
|
|
| P |
|
Paper map |
| |
|
|
| SUFF |
|
Letter suffix added to cireg by COA |
| |
|
|
| |
|
|
| TYPE |
|
Identifies island and other type polygons (Items
marked by * are not completely coded at this time.) |
| 0 |
|
Island poly |
| |
|
|
| 1 |
|
Marine poly |
| |
|
|
| 2 |
|
Estuarine poly |
| |
|
|
| 3 |
|
Tidal fresh polygon* |
| |
|
|
==================
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