## GeMS validation of SANGR2025.1.gdb

File written by GeMS_ValidateDatabase.py, version of 02/19/2025
Tue Dec 30 14:53:24 2025
Runtime parameters
Database path: C:\Users\WVINCETT\Desktop\MD_2022_SangRun2025.1_1-2-submittal\MD_2022_SANGR2025.1_1-2\MD_2022_SANGR2025.1_1-2-database\SANGR2025.1.gdb
Output directory: C:\Users\WVINCETT\Desktop\MD_2022_SangRun2025.1_1-2-submittal
Metadata file: None
Check embedded metadata: False
Skip topology check: False
Refresh GeoMaterialDict: False
Delete extra rows in Glossary and DataSources: False
Compact GDB: True
This database is LEVEL 3 COMPLIANT.
Check Metadata option was skipped. Be sure to have prepared valid metadata and check this option to produce a complete report.
This file should be accompanied by SANGR2025.1.gdb-ValidationErrors.html and a metadata summary from mp in the same directory.
If this database will be submitted to the NGMDB, it also needs to be accompanied by a reviewed Geologic Names report that includes identification of any suggested modifications to Geolex. Use the Geologic Names Check tool to generate that report or provide other documentation of a review.
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### Contents

Compliance Criteria
Warnings
Content not specified in GeMS schema
Occurrence of MapUnits in DMU, feature datasets, or geopackage tables
Contents of Nonspatial Tables
DataSources
DescriptionOfMapUnits
Glossary
Database Inventory

### Compliance Criteria

#### LEVEL 1

Criteria for a LEVEL 1 GeMS database are:

- No overlaps or internal gaps in map-unit polygon layer
- Contacts and faults in single feature class
- Map-unit polygon boundaries are covered by contacts and faults lines

Databases with a variety of schema may meet these criteria. This script cannot confirm LEVEL 1 compliance.

#### LEVEL 2--MINIMALLY COMPLIANT

A LEVEL 2 GeMS database is accompanied by a peer-reviewed Geologic Names report, including identification of suggested modifications to Geolex, and meets the following criteria:

2.1 Has required elements: nonspatial tables DataSources, DescriptionOfMapUnits, GeoMaterialDict; feature dataset GeologicMap with feature classes ContactsAndFaults and MapUnitPolys | PASS
2.2 Required fields within required elements are present and correctly defined | PASS
2.3 All MapUnitPolys and ContactsAndFaults based feature classes obey Level 2 topology rules: no internal gaps or overlaps in MapUnitPolys, boundaries of MapUnitPolys are covered by ContactsAndFaults | PASS
2.4 All map units in MapUnitPolys have entries in DescriptionOfMapUnits table | PASS
2.5 No duplicate MapUnit values in DescriptionOfMapUnit table | PASS
2.6 Certain field values within required elements have entries in Glossary table | PASS
2.7 No duplicate Term values in Glossary table | PASS
2.8 All xxxSourceID values in required elements have entries in DataSources table | PASS
2.9 No duplicate DataSources_ID values in DataSources table | PASS

#### LEVEL 3--FULLY COMPLIANT

A LEVEL 3 GeMS database meets these additional criteria:

3.1 Table and field definitions beyond Level 2 conform to GeMS schema | PASS
3.2 All MapUnitPolys and ContactsAndFaults based feature classes obey Level 3 topology rules: No ContactsAndFaults overlaps, self-overlaps, or self-intersections. | PASS
3.3 No missing required values | PASS
3.4 No missing terms in Glossary | PASS
3.5 No unnecessary terms in Glossary | PASS
3.6 No missing sources in DataSources | PASS
3.7 No unnecessary sources in DataSources | PASS
3.8 No map units without entries in DescriptionOfMapUnits | PASS
3.9 No unnecessary map units in DescriptionOfMapUnits | PASS
3.10 HierarchyKey values in DescriptionOfMapUnits are unique and well formed | PASS
3.11 All values of GeoMaterial are defined in GeoMaterialDict. GeoMaterialDict is as specified in the GeMS standard | PASS
3.12 No duplicate _ID values | PASS
3.13 No zero-length, whitespace-only, or bad null values | PASS

### Warnings

There are 1 warnings

### Content not specified in GeMS schema

Some of the extensions to the GeMS schema identified here may be necessary to capture geologic content and are entirely appropriate. Please document these extensions in metadata for the database, any accompanying README file, and (if applicable) any transmittal letter that accompanies the dataset. Other extensions may be intermediate datasets, fields, or files that should be deleted before distribution of the database.

#### Fields

OrientationPoints_Display, FieldID
OrientationPoints_Display, OrientationPoints_AllID
OrientationPoints_All, FieldID
OrientationPoints_All, OrientationPoints_DisplayID
Stations, SignificantDimentionMeters

#### Tables

MapOutline

### Occurrence of MapUnit in DMU, feature datasets, or geopackage tables

MapUnit | DescriptionOfMapUnits | GeologicMap
--- | --- | ---
Pp | X | X
Qal | X | X
Qc | X | X
Qt | X | X
Pa | X | X
Mmc | X | X
Qps | X | X
Dh | X | X
Pcg | X | X
Mg | X | X
MDr | X | X
Mp | X | X

### Contents of Nonspatial Tables

#### DataSources

OBJECTID | Source | Notes | URL | DataSources_ID
--- | --- | --- | --- | ---
4 | Neuendorf et al., eds., 2011 | modified from Neuendorf, K.K.E., Mehl Jr., J.P., and Jackson, J.A., eds. 2011. Glossary of Geology (Fifth Edition, Revised). Alexandria, VA. American Geological Institute. 783 p. | https://www.americangeosciences.org/pubs/glossary | AGI_2011
13 | Baker-Wibberly and Associates, Inc., 1973 | Baker-Wibberly and Associates, Inc., 1973. Mine abatement measures for the Northern Youghiogheny River Complex, unpublished report to the Maryland Geological Survey, 103 p. | None | BWA_1973
14 | Cox, D.D., 1968 | Cox, D.D., 1968, A late-glacial pollen record from the West Virginia–Maryland border: Castanea, v. 33, p. 137–149. | https://www.jstor.org/stable/4031904 | CAST_33.2.137
3 | FGDC, 2006 | Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates. | https://ngmdb.usgs.gov/fgdc_gds/geolsymstd.php | FGDC-STD-013-2006
2 | definitions copied from GeMS, 2020 | U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)—A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, book 11, chap. B10, 74 p., https://doi.org//10.3133/tm11B10. | https://pubs.usgs.gov/publication/tm11B10 | GeMS_2020
12 | MD iMAP, County Boundary | Maryland State, MD iMAP Data Catalog (DoIT), Maryland Political Boundaries - County Boundary, publ. 2015-07, accessed 2024-02. | https://mdgeodata.md.gov/imap/rest/services/Boundaries/MD_PoliticalBoundaries/FeatureServer/1 | IMAP_PolB_CB_2015
10 | Brezinski, D.K., 1989 | Brezinski, D.K., 1989. The Mississippian System in Maryland: Maryland Geological Survey Report of Investigations No. 52, 75 p. | http://www.mgs.md.gov/reports/RI_52.pdf | MGS_RI_52
11 | Kavage Adams, R., field observations | field observations and interpretations from Rebecca Kavage Adams of the Maryland Geological Survey | None | MGS_RKA
1 | Kavage Adams, 2025 | Kavage Adams, R., 2025. Geologic Map of the Maryland Portion of the Sang Run Quadrangle, Garrett County, Maryland. Maryland Geological Survey, Quadrangle Geologic Map, scale 1:24,000. | http://www.mgs.md.gov/publications/maps.html | MGS_SANGR2025.1
9 | Swartz, C.K., and Baker, W.A., 1922 | Swartz, C.K., and Baker, W.A., 1922. The coal formations and mines of Maryland, in Second Report on the coals of Maryland: Maryland Geological Survey, v. 11, pt. 1, 296 p. | https://www.msa.maryland.gov/megafile/msa/speccol/sc6000/sc6046/000000/000001/000000/000011/pdf/msa_sc6046_1_11.pdf | MGS_Vol_11_1
5 | National Hydrography Dataset | U.S. Geological Survey, 2020, National Hydrography Dataset (NHD), accessed October 2023 at https://www.usgs.gov/national-hydrography/national-hydrography-dataset | https://www.usgs.gov/national-hydrography/national-hydrography-dataset | NHD_2020
8 | Jacobsen, E.F., and Lyons, P.C., 1985 | Jacobsen, E.F., and Lyons, P.C., 1985. Coal geology of the lower Youghiogheny coal field, Garrett County, Maryland: U.S. Geological Survey Coal Map 101, scale 1:24,000. | https://pubs.usgs.gov/coal/101/plate-1.pdf | USGS_CM101_1985

#### DescriptionOfMapUnits

OBJECTID | MapUnit | Name | FullName | Age | Description | HierarchyKey | ParagraphStyle | Label | Symbol | AreaFillRGB | AreaFillPatternDescription | DescriptionSourceID | GeoMaterial | GeoMaterialConfidence | DescriptionOfMapUnits_ID
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
2 | Qal | Alluvium | Alluvium | Quaternary | Unconsolidated clay, sand, silt, pebbles, cobbles and boulders. Olive gray to medium dark gray, weathering moderate brown. Finer alluvium such as sand, silt and gravel underlies many of the lower gradient streams, while steeper streams are frequently floored by bedrock or locally derived cobbles and boulders. Valley floors are narrow in the steep terrain of resistant sandstones (Pottsville Formation) and coarse colluvium is transitional with alluvium. Floodplains develop sinuosity on the soluble limestones of the Greenbrier Formation. Total thickness ranges from a thin veneer to 15 feet (5 m). | 01-01 | DMU Unit 1 | Qal | 40 | 255,255,179 | None | MGS_SANGR2025.1 | Alluvial sediment | High | DMU02
3 | Qc | Colluvium | Colluvium | Quaternary | Unconsolidated coarse cobbles, boulders and large blocks of sandstone and conglomerate. Light olive gray to yellowish gray. Typically derived from massive Pottsville Formation sandstones that were transported by gravity, debris flow, and freeze-thaw processes. Abundant on steeper slopes adjacent to the Youghiogheny River. Includes boulder streams and boulder fields. Thickness estimated at 3 to 50 feet (1-15 m). | 01-02 | DMU Unit 1 | Qc | 62 | 255,222,128 | None | MGS_SANGR2025.1 | Colluvium and other widespread mass-movement sediment | High | DMU03
4 | Qps | Peatland and swamp deposits | Peatland and swamp deposits | Quaternary | Peat, clay and sandy clay. Peat is grayish brown with thickness of 3 feet (1 m). Beneath peat is clay and sandy clay ranging from light brown to brown with plant debris and wood fragments. Deposits are located near the southwest corner of the quadrangle where solution of the Greenbrier Limestone forms a broad, poorly drained valley above the resistant Pottsville Formation sandstones at Muddy Falls. Total thickness is greater than 11 feet (3.5 m) (Cox, 1968). | 01-03 | DMU Unit 1 | Qps | 120 | 235,255,222 | None | MGS_SANGR2025.1|CAST_33.2.137 | Peat and muck | High | DMU04
5 | Qt | Terrace deposits | Terrace deposits | Quaternary | Very poorly sorted clay, sand, pebbles, gravel and boulders from 55 to 80 feet (17-25 m) above the Youghiogheny River. Clasts are moderately well rounded to well rounded. Thickness is estimated at 10 feet (3 m). | 01-04 | DMU Unit 1 | Qt | 71 | 255,235,102 | None | MGS_SANGR2025.1 | Alluvial sediment | High | DMU05
6 | Pcg | Glenshaw Formation | Glenshaw Formation of the Conemaugh Group | Pennsylvanian | Shale, sandstone, siltstone, limestone, coal and underclay. Shale medium gray to black, thinly bedded, fissile, typically found in association with coal and clay layers. Coarse olive gray sandstone weathers yellowish brown with black and orange stained pitted surfaces. Some tabular cross bedding present. Only lower portion of Conemaugh Group corresponding to Glenshaw Formation is present including Lower Bakerstown (lb) and Brush Creek (bc) coals. The Mahoning Sandstone above the Upper Freeport Coal is also present. Base is mapped at the top of the Upper Freeport Coal. Total thickness is 800-900 ft (245-275 m), thickness present on Sang Run quadrangle is 200-250 feet (60-75 m). | 02-01 | DMU Unit 1 | *cg | 421 | 179,235,222 | None | MGS_SANGR2025.1 | Sandstone and mudstone | High | DMU06
7 | Pa | Allegheny Formation | Allegheny Formation | Pennsylvanian | Sandstone, conglomerate, shale, coal and underclay. Interbedded sandstone and conglomerate, very light to medium light gray, thick-bedded to massive with white quartz pebbles. Tabular cross bedding and iron staining common and occasional iron banding. Erosional channel bases are covered with plant fossils, black and moderate brown iron staining and stylolites. Shale, medium gray to black, thinly bedded, fissile, typically found in contact with coal and clay layers and capped by resistant sandstone layers. Three mineable coals are mapped (from top): Upper Freeport (uf), Upper and Lower Kittanning (uk, lk). Upper Freeport marks the top of the Allegheny Formation. Base is mapped on occurrence of Clarion (cl, Mt. Savage of Swartz, 1922) coal and clay zone and/or the top of the Homewood Sandstone. Commercial coal mining in the Upper Youghiogheny basin was largely confined to the northwest and southeast quadrants of the Sang Run quadrangle. 200-250 feet (60-75 m) thick. | 03-01 | DMU Unit 1 | *a | 521 | 153,235,222 | None | MGS_SANGR2025.1|MGS_Vol_11_1 | Mostly sandstone | High | DMU07
8 | Pp | Pottsville Formation | Pottsville Formation | Pennsylvanian | Sandstone, conglomerate, shale, coal and underclay. Four sandstone members are recognized but not mapped (top to bottom): the Homewood Sandstone, Lower and Upper Connoquenessing Sandstone, and Sharon Sandstone (Swartz, 1922). The Homewood Sandstone is massive, white-gray, conglomeratic sandstone with tabular cross bedding, erosional channel bases with fossil plant fragments. The Lower and Upper Connoquenessing Sandstones are olive green to yellowish brown, thin-bedded to massive coarse-grained sandstone, parting on layers, cross bedded with channel-fill bases underlain by plant fossils up to 6 feet. The Sharon Sandstone is pale yellowish brown, massive, conglomeratic sandstone with pebbles up to 0.5 inches. Occasional shale, thin coal, and underclay layers are also present (Quakertown and Mercer coals of Swartz, 1922). One coal layer (Sharon, sh) near the base of the formation is mapped based on the location of abandoned mine adits. The Pottsville Formation rests unconformably on the Mauch Chunk Formation. Base is beneath the Sharon Sandstone where present, but frequently covered so it is mapped on disappearance of olive green sandstone and appearance of red and green argillaceous lithology or red soil. The Homewood and Connoquenessing Sandstones form ledges and cliffs in the Upper Youghiogheny at and near Swallow Falls and River Hill. Quarried historically and presently for sand. Total thickness is 150-200 feet (45-60 m). | 04-01 | DMU Unit 1 | *p | 733 | 102,204,204 | None | MGS_SANGR2025.1|MGS_Vol_11_1 | Mostly sandstone | High | DMU08
9 | Mmc | Mauch Chunk Formation | Mauch Chunk Formation | Mississippian | Shale, siltstone, sandstone and limestone. Shale reddish gray, olive green, thin-bedded, fissile with root casts. Easily weathered and typically covered, forms reddish gray soil. Siltstone and sandstone, thin- to medium-bedded, light olive gray, argillaceous, micaceous, frequently cross bedded in multi-stacked fluvial layers that outcrop as small ridges on hillsides and bedrock steps in streams. Base is mapped in red and green shale below 15-foot (5 m) thick Reynolds Member, that is gray fossiliferous sandy limestone. Best exposure is in the Youghiogheny River upstream of the mouth of Hoyes Run and in Hoyes Run. Total thickness is 450 feet (150 m). | 05-01 | DMU Unit 1 | Mmc | 603 | 128,204,255 | None | MGS_SANGR2025.1 | Sandstone and mudstone | High | DMU09
10 | Mg | Greenbrier Formation | Greenbrier Formation | Mississippian | Limestone, shale, siltstone and sandstone. Four members are recognized but not mapped (Brezinski, 1989). The basal Loyalhanna Member is reddish gray to light gray, arenaceous limestone with strong cross bedding accentuated by weathering, approximately 50 feet (13 m) thick. The overlying Deer Valley Member is light olive gray, massive, crystalline limestone with white to pink calcite veins and slickensides with thin silt beds that occur every 4-6 inches. It weathers to moderate yellowish brown and is approximately 15 feet (5 m) thick. The Savage Dam Member overlies the Deer Valley Member, and is comprised of mostly clastic reddish gray, grayish green, thin-bedded siltstone and shale with variegated mudcracks. The sandstone layers are pale, yellowish brown to yellowish gray, thick to massive, cross bedded and calcareous. Approximate thickness of the Savage Dam Member is 75 feet (25 m). The uppermost Wymps Gap Member is light olive gray to medium dark gray, shale to sandy argillaceous limestone with abundant brachiopod, bryzoan and crinoid fossils. Bedding is thin to massive, ripple laminated and sometimes nodular. A distinct fetid odor emerges upon breakage of some beds. White calcite slickensides are present on fracture planes. Thickness is approximately 45 feet (14 m). The base of the Greenbrier Formation is mapped at base of Loyalhanna Member, frequently expressed as a topographic break above the Purslane Formation. The Greenbrier Formation appears along the southeastern end of the Accident Anticline in the upper Hoyes Run valley, lower Sang Run valley, and along the Youghiogheny River from upstream of Steep Run to below Sang Run. It is also exposed in the northwest end of the Briery Mountain Anticline at quarries near Cranesville Swamp. Shelter caves form along the Youghiogheny corridor upstream of Sang Run where white calcareous sandstones weather away under clastic layers in the Savage Dam Member. Total thickness is 185 feet (56 m). | 06-01 | DMU Unit 1 | Mg | 501 | 153,235,255 | None | MGS_SANGR2025.1|MGS_RI_52 | Limestone | High | DMU10
11 | Mp | Purslane Formation | Purslane Formation | Mississippian | Sandstone and conglomerate. Sandstone is predominant in the upper portion of the formation and is light olive gray, thin- to medium-bedded, flaggy, cross bedded, and contains erosional bases with shale rip up clasts. Weathers moderate brown. The base of the formation is a massive yellowish gray to very pale orange conglomerate with rounded, clear to white quartz pebbles ranging from 0.3-2 inches (1-5 cm). Some layers within this basal conglomerate are friable, white, and have erosional channel bases. The base of the Purslane Formation is mapped below this massive conglomerate, which forms ledges and block fields subordinate to those of the Pottsville Formation. The Purslane Formation appears in the northeast section of the quadrangle in the headwaters of Ginseng Run on the southern nose of the Accident Anticline. A small, previously unmapped section of the upper Purslane is also exposed in the mouth of Steep Run at the Youghiogheny River. Equivalent to upper portion of the Price Formation in West Virginia. Total thickness is 250-300 feet (75-90 m). | 07-01 | DMU Unit 1 | Mp | 301 | 204,235,255 | None | MGS_SANGR2025.1 | Mostly sandstone | High | DMU11
12 | MDr | Rockwell Formation | Rockwell Formation | Devonian-Mississippian | Shale, siltstone and sandstone. Siltstone and sandstone are olive green to yellowish gray, thin- to thick-bedded, cross bedded with erosional bases, and burrowed. Shale is olive gray to black, thin-bedded, and sometimes fossiliferous including brachiopods, indeterminate bivalves and plant fragments. The base of the formation is mapped where tan sands of the Rockwell Formation become prevalent over red shales of the Hampshire Formation. Equivalent to lower portion of the Price Formation in West Virginia. Total thickness is 150-200 feet (45-65 m). | 08-01 | DMU Unit 1 | MDr | 614 | 128,179,235 | None | MGS_SANGR2025.1 | Sandstone and mudstone | High | DMU12
13 | Dh | Hampshire Formation | Hampshire Formation | Devonian | Shale, siltstone and sandstone. Shale is grayish red, greenish gray, thin-bedded, hackly with root-casts. Siltstone and sandstone are olive green and grayish red, cross bedded, blocky. Calcareous channel lag conglomerate is present near confluence of Stony Creek and South Bear Branch. Mostly covered and mapped on presence of grayish red soil. Base not present on quadrangle. Equivalent to the Hampshire Group in West Virginia. Thickness exposed in the Sang Run Quadrangle is 50-100 feet (15-30 m). | 09-01 | DMU Unit 1 | Dh | 414 | 179,179,235 | None | MGS_SANGR2025.1 | Sandstone and mudstone | High | DMU13

#### Glossary

OBJECTID | Term | Definition | DefinitionSourceID | Glossary_ID
--- | --- | --- | --- | ---
7 | bedding | Formed, arranged, or deposited in layers or beds, or made up of or occurring in the form of beds; esp. said of a layered sedimentary rock, deposit, or formation. The term has also been applied to nonsedimentary material that exhibits depositional layering, such as the "bedded deposits" of volcanic tuff alternating with lava in the mantle of a stratovolcano. | AGI_2011 | GLO07
1 | certain | Identity of a feature can be determined using relevant observations and scientific judgment; therefore, one can be reasonably confident in the credibility of this interpretation. | FGDC-STD-013-2006 | GLO01
13 | coal | An outcrop or trace of a coal bed or stratum. | MGS_SANGR2025.1 | GLO12
6 | contact | A plane or irregular surface between two different types or ages of rock, sediment or other geologic and stratigraphic units. | AGI_2011 | GLO06
5 | cross section | A plane or polyline along which a diagram is drawn showing the transected subsurface and topographic features and geology; specifically a vertical section drawn at right angles to the longer axis of a geologic feature. | AGI_2011 | GLO05
4 | DMU Unit 1 | Formation style, bolded title, 11pt Times New Roman font. This format is used for largest unit descriptions where units are not shown on map unit. Units mapped at the surface, and may or may not contain subunits. | MGS_SANGR2025.1 | GLO04
8 | fault | A discrete surface or zone of discrete surfaces separating two rock masses across which one mass has slid past the other. | AGI_2011 | GLO08
3 | High | The selected term in the GeoMaterial field (and its definition) adequately characterizes the overall lithologic nature of rocks and (or) sediments in the map unit. | GeMS_2020 | GLO03
9 | joint | A planar fracture, crack, or parting in a rock, without shear displacement. | AGI_2011 | GLO09
10 | neatline | Map Outline | MGS_SANGR2025.1 | GLO10
2 | questionable | Identity of a feature cannot be determined using relevant observations and scientific judgment; therefore, one cannot be reasonably confident in the credibility of this interpretation. For example, IdentityConfidence = questionable is appropriate when a geologist reasons "I can see some kind of planar feature that separates map units in this outcrop, but I cannot be certain if it is a contact or a fault." | FGDC-STD-013-2006 | GLO02
14 | recreational GPS | Field-based method to collect data observations. Collected using tablet and usually 30 ft accuracy confidence. | MGS_SANGR2025.1 | GLO13
15 | State boundary | State of Maryland boundary line. | MGS_SANGR2025.1|IMAP_PolB_CB_2015 | GLO14
11 | water | Perrenial natural or manmade areas of surface water of adequate size to map, including streams, rivers, lakes, impoundments. | MGS_SANGR2025.1 | GLO11

### Database Inventory

This summary of database content is provided as a convenience to GIS analysts, reviewers, and others. It is not part of the GeMS compliance criteria.
DataSources, nonspatial table, 12 rows
DescriptionOfMapUnits, nonspatial table, 12 rows
GeoMaterialDict, nonspatial table, 101 rows
Glossary, nonspatial table, 14 rows
GeologicMap, feature dataset
MapUnitOverlayPolys, simple polygon feature class, 48 rows
ContactsAndFaults, simple polyline feature class, 124 rows
GeologicLines, simple polyline feature class, 27 rows
CartographicLines, simple polyline feature class, 1 rows
OrientationPoints_Display, simple point feature class, 162 rows
MapUnitPolys, simple polygon feature class, 34 rows
OrientationPoints_All, simple point feature class, 759 rows
Stations, simple point feature class, 499 rows
OverlayPolys, simple polygon feature class, 1 rows
MapOutline, simple polyline feature class, 1 rows