RIVERS
Status: Obtained in 1995
SOURCE/CONVERSION METHODOLOGY
This data layer is from Boston Edison Company (BECo.). The original aerial photography flown between 1990 and 1991 at 1" =600’ negative scale. Digital planmetric data meet National Map Accuracy Standards for 1"=100’ mapping.
COVERAGE NAME
RIVER
FEATURE TYPE
ARC
ATTRIBUTES
Arc Attribute Table (RIVER.AAT):
Arc: items river.aat
| COLUMN | ITEM NAME | WIDTH | OUTPUT | TYPE | N.DEC | ALTERNATE NAME | INDEXED? |
| 1 | FNODE# | 4 | 5 | B | - | - | |
| 5 | TNODE# | 4 | 5 | B | - | - | |
| 9 | LPOLY# | 4 | 5 | B | - | - | |
| 13 | RPOLY# | 4 | 5 | B | - | - | |
| 17 | LENGTH | 8 | 18 | F | 5 | - | |
| 25 | RIVER# | 4 | 5 | B | - | - | |
| 29 | RIVER-ID | 4 | 5 | B | - | - | |
| 33 | SERVER-ID | 4 | 5 | B | - | - | |
| 37 | TILE-ID | 4 | 5 | B | - | - | |
| 41 | MAJOR1 | 6 | 6 | I | - | - | |
| 47 | MINOR1 | 6 | 6 | I | - | - | |
| 53 | FEATURE | 45 | 45 | C | - | - |
* See Appendix G for detail
Sample record of the RIVER arc attribute table:
Arc: items river.aat
4
FNODE# = 7
TNODE# = 8
LPOLY# = 1
RPOLY# = 1
LENGTH = 51.81994
RIVER# = 4
RIVER-ID = 12564
SERVER-ID = 1
TILE-ID = 743
MAJOR1 = 142
MINOR1 = 117
FEATURE = RIVER
COORDINATE SYSTEM
Massachusetts State Plane North America Datum (NAD) 83 Feet