The geo_net coverage includes polygons that are map units and
open water, and arcs that are contacts, color boundaries, and
shoreline.
The geo_net.pat INFO file consists of the following items:
GEOCODE--Refers to the type of polygon and is one of the following:
map unit code (e.g., tl,tsa), "lake", or "river".
AGE--Refers to the age of the map unit and is one of the following:
"EARLY WISCONSIN AND ILLINOIAN", "EARLY WISCONSIN", "HOLOCENE
AND LATE WISCONSIN", "HOLOCENE AND WISCONSIN", "HOLOCENE",
"ILLINOIAN AND PRE-ILLINOIAN", "ILLINOIAN", "LATE WISCONSIN AND
MIDDLE WISC", "LATE WISCONSIN", "WISCONSIN", OR "PRE-QUATERNARY".
MORAINES--A modifier to the map unit indicating that the unit is a
moraine and is one of the following: "Ground Moraine", "Ground
moraine and end moraine", "Ground Moraine and end moraine under
Lake Erie", "Ground Moraine and end moraine under Lake Ontario",
"Ground Moraine and end moraine under Lakes Erie and Ontario",
"End Moraine", or "Attenuated drift", "Ground Moraine under
Lake Erie", "Ground Moraine under Lake Huron", "Ground Moraine
under Lakes Erie and Ontario", "Ground moraine veneer over nonoriented
hummocky topography of older till or ice-contact sand and gravel", or
"Stagnation moraine".
MAPUNITS--A description of the soils within the map units (see below).
MODIFIER--Indicates the names of labeled rivers and lakes or
indicates if the map unit is submerged or is a veneer.
COLOR--An integer value representing a shade pattern in the shadeset
color524.shd used in preparing the graphic of the map.
Items in geo_net.pat are defined as follows:
GEOCODE MAPUNITS, (AGE)
lm LAKE CLAY AND SILT (under Lakes Huron, Erie, and Ontario),
(HOLOCENE)
ls LAKE SAND AND GRAVEL (under Lakes Huron, Erie, and Ontario),
(HOLOCENE)
al ALLUVIUM (HOLOCENE AND LATE WISCONSIN)
lc LAKE SILT AND CLAY (under Lakes Huron, Erie, and Ontario),
(HOLOCENE AND LATE WISCONSIN)
lcb LAKE CLAY, SILT, SAND, AND GRAVEL (under Lakes St. Clair
and Erie), (HOLOCENE AND LATE WISCONSIN)
lcc LAKE CLAY, SILT, SAND, AND GRAVEL (HOLOCENE AND
LATE WISCONSIN)
lca LAKE SILT AND CLAY (HOLOCENE AND LATE WISCONSIN)
lsa LAKE SAND AND GRAVEL (HOLOCENE AND LATE WISCONSIN)
hs SWAMP DEPOSIT (HOLOCENE AND LATE WISCONSIN)
hp PEAT (HOLOCENE AND LATE WISCONSIN)
ed DUNE SAND (HOLOCENE AND LATE WISCONSIN)
eu EOLIAN SAND AND SILT (HOLOCENE AND LATE WISCONSIN)
cbb BOULDERY COLLUVIUM AND ROCK WASTE (HOLOCENE AND WISCONSIN)
cl LOAMY COLLUVIUM (HOLOCENE AND WISCONSIN)
clc LOAMY COLLUVIUM (HOLOCENE AND WISCONSIN)
cld LOAMY COLLUVIUM (HOLOCENE AND WISCONSIN)
jla LOAMY COLLUVIUM AND LANDSLIDE DEPOSITS--Areas with abundant
or widely distributed landslide deposits (HOLOCENE AND
WISCONSIN)
jlb LOAMY COLLUVIUM AND LANDSLIDE DEPOSITS--Areas with scattered
or localized landslide deposits (HOLOCENE AND WISCONSIN)
Tills in Michigan, Ohio, Pennsylvania, and New York
tc CLAYEY TILL, Ground moraine, (LATE WISCONSIN)
tc CLAYEY TILL, End moraine (LATE WISCONSIN)
tcd CLAYEY TILL, Ground moraine under Lake Erie, (LATE WISCONSIN)
tcd CLAYEY TILL, End moraine, (LATE WISCONSIN)
tca CLAYEY TILL, Ground moraine, (LATE WISCONSIN)
tca CLAYEY TILL, Ground moraine under Lake Erie, (LATE WISCONSIN)
tca CLAYEY TILL, Ground moraine veneer (LATE WISCONSIN)
tca CLAYEY TILL, End moraine (LATE WISCONSIN)
tcb CLAYEY TILL, Ground moraine (LATE WISCONSIN)
tcb CLAYEY TILL, Stagnation moraine, (LATE WISCONSIN)
tcb CLAYEY TILL, End moraine (LATE WISCONSIN)
tcg CLAYEY TILL, Ground moraine (LATE WISCONSIN)
tcg CLAYEY TILL, Ground moraine veneer (LATE WISCONSIN)
tl LOAMY TILL, Ground moraine (LATE WISCONSIN)
tl LOAMY TILL, Ground moraine under Lake Huron, (LATE WISCONSIN)
tl LOAMY TILL, Ground moraine veneer (LATE WISCONSIN)
tl LOAMY TILL, Stagnation moraine, (LATE WISCONSIN)
tl LOAMY TILL, End moraine (LATE WISCONSIN)
tlb LOAMY TILL, Ground moraine, (LATE WISCONSIN)
tlb LOAMY TILL, Ground moraine veneer (LATE WISCONSIN)
tlb LOAMY TILL, End moraine (LATE WISCONSIN)
tld LOAMY TILL, Ground moraine, (LATE WISCONSIN)
tld LOAMY TILL, End moraine (LATE WISCONSIN)
tlg LOAMY TILL, Ground moraine (LATE WISCONSIN)
tlg LOAMY TILL, Ground moraine under Lakes Erie and Ontario
(LATE WISCONSIN)
tlg LOAMY TILL, Ground moraine veneer (LATE WISCONSIN)
tlg LOAMY TILL, Stagnation moraine (LATE WISCONSIN)
tlg LOAMY TILL, End moraine (LATE WISCONSIN)
tlr LOAMY TILL, Attenuated drift (LATE WISCONSIN)
tlh LOAMY TILL, Ground moraine (LATE WISCONSIN)
tlh LOAMY TILL, End moraine (LATE WISCONSIN)
td SANDY LOAMY TILL, Ground moraine (LATE WISCONSIN)
td SANDY LOAMY TILL, End moraine (LATE WISCONSIN)
Tills in Ontario (Ground moraine and end moraine not distinguished)
tap CLAYEY TILL (LATE WISCONSIN)
taa CLAYEY TILL (LATE WISCONSIN)
tab CLAYEY TILL, Ground moraine and end moraine (LATE WISCONSIN)
tab CLAYEY TILL, Ground moraine and end moraine under Lakes
Erie and Ontario (LATE WISCONSIN)
tak CLAYEY TILL, Ground moraine and end moraine (LATE WISCONSIN)
tak CLAYEY TILL, Ground moraine under Lake Huron
(LATE WISCONSIN)
taq CLAYEY TILL (LATE WISCONSIN)
tae CLAYEY TILL, Ground moraine and end moraine, (LATE WISCONSIN)
tae CLAYEY TILL, Ground moraine and end moraine under Lake Erie
(LATE WISCONSIN)
tai CLAYEY TILL (LATE WISCONSIN)
tao CLAYEY TILL (LATE WISCONSIN)
taf CLAYEY TILL (LATE WISCONSIN)
tka LOAMY TILL, Ground moraine and end moraine (LATE WISCONSIN)
tka LOAMY TILL, Ground moraine and end moraine under Lake Ontario
(LATE WISCONSIN)
tkk LOAMY TILL, Ground moraine and end moraine (LATE WISCONSIN)
tkk LOAMY TILL, Ground moraine and end moraine under Lake Erie
(LATE WISCONSIN)
tkl LOAMY TILL (LATE WISCONSIN)
tkg LOAMY TILL (LATE WISCONSIN)
tkn LOAMY TILL (LATE WISCONSIN)
tkh LOAMY TILL (LATE WISCONSIN)
tko LOAMY TILL (LATE WISCONSIN)
tkf LOAMY TILL (LATE WISCONSIN)
tki LOAMY TILL (LATE WISCONSIN)
teb SANDY LOAMY TILL (LATE WISCONSIN)
kg ICE-CONTACT SAND AND GRAVEL (LATE WISCONSIN)
ks ICE-CONTACT SAND (LATE WISCONSIN)
ke KAME END MORAINE (LATE WISCONSIN)
gg OUTWASH SAND AND GRAVEL (LATE WISCONSIN)
gs OUTWASH SAND (LATE WISCONSIN)
gkl OUTWASH SAND AND GRAVEL (LATE WISCONSIN)
lcr ATTENUATED LAKE SILT AND CLAY (LATE WISCONSIN)
lla SLACKWATER LAKE SILT AND SAND (LATE WISCONSIN)
nlc LOAMY SOLIFLUCTION DEPOSITS (LATE WISCONSIN)
lch LAKE SAND, SILT, AND CLAY (LATE WISCONSIN AND MIDDLE WISCONSIN)
lcj LAKE SAND, SILT, AND CLAY (WISCONSIN)
lgk LAKE GRAVEL, SAND, SILT, AND CLAY (WISCONSIN)
tar CLAYEY TILL (EARLY WISCONSIN)
tlj LOAMY TILL (EARLY WISCONSIN)
tle LOAMY TILL (EARLY WISCONSIN)
tdg SANDY LOAMY TILL (EARLY WISCONSIN)
kgb ICE-CONTACT SAND AND GRAVEL (EARLY WISCONSIN)
nma CLAYEY TO SANDY SOLIFLUCTION DEPOSITS (WISCONSIN AND
ILLINOIAN)
nla LOAMY SOLIFLUCTION DEPOSITS (WISCONSIN AND ILLINOIAN)
nlb LOAMY SOLIFLUCTION DEPOSITS (WISCONSIN AND ILLINOIAN)
gga OUTWASH SAND AND GRAVEL (EARLY WISCONSIN AND ILLINOIAN)
llb SLACKWATER LAKE SILT AND SAND (EARLY WISCONSIN AND
ILLINOIAN)
tcm CLAYEY TILL, Ground moraine (ILLINOIAN)
tcm CLAYEY TILL, End moraine (ILLINOIAN)
tlm LOAMY TILL (ILLINOIAN)
tlo LOAMY TILL (ILLINOIAN)
kgi ICE-CONTACT SAND AND GRAVEL (ILLINOIAN)
ggi OUTWASH SAND AND GRAVEL (ILLINOIAN)
lci LAKE CLAY AND SILT (ILLINOIAN)
lle LAKE SAND, SILT, AND CLAY (ILLINOIAN AND PRE-ILLINOIAN)
rci LOAMY TO CLAYEY SOLUTION RESIDUUM (QUATERNARY)
zla LOAMY DECOMPOSITION RESIDUUM (QUATERNARY)
zlb LOAMY DECOMPOSITION RESIDUUM (QUATERNARY)
R BEDROCK, (PRE-QUATERNARY)
f MANMADE LAND
The geo_net.aat INFO file consists of the following item:
LTYPE--Refers to the type of arc and is one of the following:
"contact", "shoreline", "map boundary", or "null".
The gla_lin coverage contains lines of linear glacial features.
The gla_lin.aat INFO file consists of the following items:
TYPE--Refers to the type of glacial feature described by the arc
and is one of the following: "esker", "limit of glacial
advance", "buried moraine", "crest of end moraine", "meltwater
channel", or "map boundary".
MODIFIER--Refers only to type = "meltwater channel" and IS
either "left bank" or "right bank".
ACCURACY--Refers to accuracy of location of arcs in the gla_lin
coverage and is either "certain" or "inferred".
CONTACT--Refers to whether the line is a contact between map units and
is either "y" or "n".
The gla_pnt coverage contains points that represent drumlins,
places where the direction of ice movement is indicated by
striations, or the location of important stratigraphic sections.
The gla_pnt.pat INFO file consists of the following items:
TYPE--Refers to the type of feature shown at the point and is
one of the following: "drumlin", "direction of ice movement",
"ice molded landform", "sand dune", or the name of important
stratigraphic sections.
ANGLE--Refers to the direction of drumlin or ice movement; in
degrees measured clockwise from north.
MRKANGLE--Negative of ANGLE; useful for plotting srmbols in ARCPLOT.
Hydr_lin is a line coverage created after scanning the hydrographic
layer that was used in the original paper map. It has no attributes.
Topo_lin is a line coverage created after scanning the topographic
layer that was used in the original paper map. It has no attributes.
Bnd_lin is a line coverage created from 1:2,000,000 scale U.S.
Geological Survey Digital Line Graph coverages (DLG). It contains
lines representing the U.S./Canada international boundary and state
boundaries and annotation indicating state or province names.
The bnd_lin.aat INFO file contains the following item:
TYPE--Refers to the type of line and contains the values: "state
boundary", "international boundary", or "map boundary".
Bnd_net is a polygon coverage created from 1:2,000,000 scale DLG
coverages and contains political and administrative boundaries.
Polygons are attributed in the standard DLG coding scheme and the
Federal Information Processing Standards (FIPS).
Rd_lin is a line coverage created from 1:2,000,000 DLG coverages.
The coverage contains lines representing roads in the map area.
All DLG attributes have been stripped from the lines except
ROUTE_NUMBER1, ROUTE_NUMBER2, and ROUTE_NUMBER3, which contain the
federal and state highway number designations, and ROUTE_TYPE1, which
may contain values of "Alternate", "Business", or "Truck".
Rr_lin is a line coverage created from 1:2,000,000 DLG coverages.
The coverage contains lines representing railroads in the map area.
It has no DLG attributes.
Grid_lin is a line coverage created to display projection lines in
one degree increments. It has no attributes.
