| Online link | https://geo-nsdi.er.usgs.gov/metadata/open-file/94-212/metadata.faq.html |
|---|---|
| Description | Airborne monitoring of Mount St. Helens by the USGS began in May 1980 for sulfur dioxide emissions and in July 1980 for carbon dioxide emissions. A correlation spectrometer, or COSPEC, was used to measure sulfur dioxide in Mount St. Helens' plume. The u |
| Originators | McGee, Kenneth A. and Casadevall, Thomas J. |
| Publication | U.S. Geological Survey Open-File Report 94-212 |
Version 1.0 of the Lake Mathews 7.5' quadrangle comprises three ARC/INFO coverages, of which two contain geologic data, and one contains cartographic features: lkm_geo (geology), lkm_str (structural data), and lkm_ano (annotation and leaders). Geologic data represented by line entities and the polygons they delineate are contained in the coverage LKM_GEO. For display purposes, the annotation coverage contains one annotation subclass: anno.geo contains unit labels. Geological point data includes site-specific information describing the types and the orientation of bedding, foliation, and lineations. Annotation is respective dip and plunge values associated with individual point data. >LKM_GEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 LKM_GEO# 4 5 B - > 21 LKM_GEO-ID 4 5 B - > 25 LABL 35 35 C - > 60 PLABL 35 35 C - > 95 SHD 3 3 I - > 98 SHDFIL 3 3 I - > 101 NAME 200 200 C - > >LKM_GEO.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 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 LKM_GEO# 4 5 B - > 29 LKM_GEO-ID 4 5 B - > 33 LTYPE 60 60 C - > 93 L-SYMB 3 3 I -
http://pubs.usgs.gov/of/2001/0479/pdf/README.pdf
Geologic units (LABL) and their corresponding names (NAME) identified in the Lake Mathews 7.5' quadrangle
| Label | Definition |
|---|---|
| LABL | geologic map unit label, in plain text |
| PLABL | Geological map unit label used to generate plot labels with relevant stratigraphic symbols. The geologic units with LABL designating Mesozoic (Mz) have a keystroke substitute character, }, that calls their corresponding symbols from the Geoage Font Group. Geologic map unit labels will plot on derivative map plots with appropriate stratigraphic symbols if PLABL is used as the source for unit labels. |
| SHD | polygon color (as integer value) from shadeset alc1.shd |
| SHDFIL | polygon fill pattern (as integer value) from shadeset geology2.shd |
| NAME | Geologic name of map unit (see list under LABL attribute) |
Geologic features such as contacts and faults that bound rock-unit polygons
| Label | Definition |
|---|---|
| LTYPE | Description of types of lines on the geologic map (contact, fault). |
| L-SYMB | stores appropriate line symbol value from the lineset geoscamp2.lin |
Geological point data includes site-specific information describing the types and the orientation of bedding, foliation, and lineations. One annotation subclass is included in the geologic points coverage, LKM_STR which displays the respective dip and plunge values associated with individual point data.
| Label | Definition |
|---|---|
| PTTYPE | describes type of point data (bedding, horizontal bedding, foliation) |
| P-SYMB | Coded integer value that relates point to cartographic point symbol in markerset geoscamp2.mrk |
| STRIKE | Azimuthal strike of planar feature |
| DIP | Dip of planar feature |
Annotation leaders
| Label | Definition |
|---|---|
| L-SYMB | Coded integer value (1) that relates arcs to cartographic line symbol in lineset geoscamp2.lin |