RAILROADS
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
RLRD
FEATURE TYPE
ARC
ATTRIBUTES
Arc Attribute Table (RLRD.AAT):
Arc: items rlrd.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 | RLRD# | 4 | 5 | B | - | - | |
| 29 | RLRD-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 | - | - |
* See Appendix G for detail
Sample record from the RLRD arc attribute table:
Arc: list rlrd.aat
1
FNODE# = 2
TNODE# = 3
LPOLY# = 2
RPOLY# = 2
LENGTH = 279.88198
RLRD# = 1
RLRD-ID = 31831
SERVER-ID = 2
TILE-ID = 699
MAJOR1 = 154
MINOR1 = 122
COORDINATE SYSTEM
Massachusetts State Plane North America Datum (NAD) 83 Feet