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17192500
1.0
ISO 19139 Metadata Implementation Specification
FALSE
GEN_20_Shearwave
638212.757218
862603.270669
1284551.421588
1465908.778543
1
003
-
Relationship
-
drillholes_to_interps
Relationship
-
drillholes_to_Vs
Relationship
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
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20160125
16022200
20160125
16022200
500000
5000
FGDC
dataset
20160125
ArcGIS Metadata
1.0
Don Haines
OR Dept. of Geology and Mineral Industries
Nature of the Northwest Manager
971-673-2331
971-673-1562
800 NE Oregon St. Suite 965
Portland
OR
97232
US
info@naturenw.org
9 am-12:30 pm and 1-4 pm
geodatabase
10.0
6.143
Drillholes
2013-12-31T00:00:00
vector digital data
Open-File Report O-13-12, 3D Geology and Shear-wave Velocity Models of the Portland, Oregon Metropolitan Area
Warren Roe
Oregon Department of Geology and Mineral Industries (DOGAMI)
GIS Specialist
warren.roe@dogami.state.or.us
800 NE Oregon St., Suite 965
Portland
OR
97232
US
971-673-1555
Ian Madin
Oregon Department of Geology and Mineral Industries (DOGAMI)
Chief Scientist
ian.madin@dogami.state.or.us
800 NE Oregon St., Suite 965
Portland
Oregon
97232
US
971-673-1555
Ian Madin
Oregon Department of Geology and Mineral Industries (DOGAMI)
Chief Scientist
Ian Madin
ian.madin@dogami.state.or.us
800 NE Oregon St., Suite 965
Portland
Oregon
97232
971-673-1555
Warren Roe
Oregon Department of Geology and Mineral Industries (DOGAMI)
GIS Specialist
warren.roe@dogami.state.or.us
800 NE Oregon St., suite 965
Portland
Oregon
97232
971-673-1555
Warren Roe
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This feature class contains actual and "pseudo" drillholes used to create 3D geologic and geophysical models for the 2013 Portland NEHRP project. Drillhole points were digitized from maps or coordinates in drilling reports for geotechnical or other purposes (e.g. water wells, hydrocarbon exploration, etc). The drillhole feature class participates in two one-to-many relationship classes with tables of downhole geologic interpretations (PDX_NEHRP_interpretations) and shear-wave velocity measurements (PDX_NEHRP_Vs) using the key field "LOG_ID_concatenated".</SPAN></P></DIV></DIV></DIV>
The intent of this digital data release is to provide modeling results of 3D subsurface geology in the greater Portland, Oregon metropolitan area in the form of ArcGIS Triangulated Irregular Networks (TINs) and rasters. Also included in this publication are supplemental files of modeling scripts, a spreadsheet of shear-wave analyses, and a database of drillholes, shear-wave velocities, and downhole geologic interpretations.
Warren Roe and Ian Madin
Oregon Department of Geology and Mineral Industries, 800 NE Oregon Street, #28, Suite 965, Portland, OR 97232
Rachel Smith
OR Dept. of Geology and Mineral Industries
Project Operations Manager
971-673-1555
800 NE Oregon St., Suite #965
Portland
OR
97232
US
rachel.smith@dogami.state.or.us
Oregon, Portland, Tualatin, Tigard, Beaverton, Hillsboro, Lake Oswego, West Linn, Oregon City, Gladstone, Happy Valley, Milwaukie, Gresham, Troutdale, Multnomah County, Washington County, Willamette River, Columbia River
2012, 2013
geophysics, geology, geotechnical, 3D, subsurface, drillholes
2013
Portland
Oregon
NEHRP
shear-wave velocity
Vs30
geophysics
geology
subsurface
3D
model
drillholes
geotechnical
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication.</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P><SPAN /></P></DIV></DIV></DIV>
Esri ArcGIS 10.1.1.3143
Ian Madin
Oregon Department of Geology and Mineral Industries (DOGAMI)
Chief Scientist
ian.madin@dogami.state.or.us
800 NE Oregon St., Suite 965
Portland
Oregon
97232
971-673-1555
Ian Madin
1
-123.140445
-122.246763
45.758166
45.244563
Drillholes cover a rectangular area bounding the irregularly-shaped PDX NEHRP project area polygon.
3D Model was created in 2013 and published Dec. 31, 2013.
2013-12-31T00:00:00
None
None
Rachel Smith
OR Dept. of Geology and Mineral Industries
Project Operations Manager
971-673-1555
800 NE Oregon St., Suite #965
Portland
OR
97232
US
rachel.smith@dogami.state.or.us
All thickness rasters created for Open-File Report O-13-12 are derived from Triangulated Irregular Networks (TINs) representing the tops and bottoms of each modeled geologic unit. The TINs themselves were developed from drillhole points, a table of downhole geologic interpretations, a high-resolution Digital Elevation Model (DEM) itself combined from lidar and sonar bathymetry, and mapped surficial geology from DOGAMI Open-File Report O-12-02 (Lidar-Based Surficial Geologic Map and Database of the Greater Portland Area).
Drillhole points were digitized from geotechnical reports and water well reports. In 2012 and 2013, geotechnical reports were provided in PDF or .tiff format from the City of Portland Bureau of Environmental Services, the City of Portland Bureau of Development Services, the City of Portland Bureau of Transportation, the Oregon Department of Transportation, the Oregon Department of Geology and Mineral Industries, the Tualatin Valley Water District, the Port of Portland, the City of Lake Oswego, TriMet, and the United States Geological Survey. A limited number of water well reports were downloaded from the Oregon Water Resources Division website in PDF format.
The high-resolution lidar and sonar DEM was compiled from multiple sources. Lidar data of the ground surface was compiled from DOGAMI and Clark County (Washington). Multibeam bathymetry along the Columbia River and lower Willamette River was collected by the National Oceanic and Atmospheric Administration in 2004 and 2008 and provided by the United States Army Corps of Engineers. DOGAMI lidar sources include the following Lidar Data Quadrangles (LDQs): LDQ-2011-45123-F2-Buxton, LDQ-2011-45123-E2-Gales Creek, LDQ-2011-45123-D-Gaston, LDQ-2011 North Coast Range Bundle 2, LDQ-2011-45123-F1-Meacham Corner, LDQ-2009-45123-E1-Forest Grove, LDQ-2009-45123-D1-Laurelwood, LDQ-2009-45123-C1-Dundee, LDQ-2009-45122-F8-Dixie Mountain, LDQ-2009-45122-E8-Hillsboro, LDQ-2009-45122-D8-Scholls, LDQ-2009-45122-C8-Newberg, LDQ-2009-45122-F7-Sauvie Island, LDQ-2009-45122-E7-Linnton, LDQ-2009-45122-D7-Beaverton, LDQ-2009-45122-C7-Sherwood, LDQ-2009-45122-E6-Portland, LDQ-2009-45122-D6-LakeOswego, LDQ-2009-45122-C6-Canby, LDQ-2009-45122-E5-Mount Tabor, LDQ-2009-45122-D5-Gladstone, LDQ-2009-45122-C5-Oregon City, LDQ-2009-45122-E4-Camas, LDQ-2009-45122-D4-Damascus, LDQ-2009-45122-C4-Redland, LDQ-2009-Mt Hood Bundle 1, LDQ-2009-45122-D3-Sandy, and LDQ-2009-45122-C3-Estacada.
The project boundary and mapped surficial and bedrock geology was derived from GIS map files found within DOGAMI Open-File Report O-12-02.
Authors: Ma, L., Madin, I. P., Duplantis, S., and Williams, K. J.
Lidar-based surficial geologic map and database of the greater Portland area, Clackamas, Columbia, Marion, Multnomah, Washington, and Yamhill counties, Oregon, and Clark County, Washington: Portland, Oregon
DOGAMI Open-File Report O-12-02
Ma, L., Madin, I. P., Duplantis, S., and Williams, K. J.
vector digital data
Don Haines
OR Dept. of Geology and Mineral Industries
Nature of the Northwest Manager
971-673-2331
971-673-1562
800 NE Oregon St. Suite 965
Portland
OR
97232
US
info@naturenw.org
9 am-12:30 pm and 1-4 pm
Don Haines
Process steps vary greatly depending which model is being created or which types of updates are being made to a model. See accompanying report.
2013-12-31T00:00:00
Warren Roe
Oregon Department of Geology and Mineral Industries (DOGAMI)
GIS Specialist
warren.roe@dogami.state.or.us
800 NE Oregon St., Suite 965
Portland
OR
97232
US
971-673-1555
Warren Roe
Horizontal consistency is non-quantifiable. Because of scope, budget, and time limitations, no effort was made to digitize all extant drillholes in the PDX NEHRP project area. The focus was on geotechnical drillholes greater than a few feet deep. Geotechnical drillholes are easy to locate at relatively higher precisions than other types of drillholes (e.g. water wells) given the average detail contained in a geotechnical report. Geotechnical reports also tend to have superior geologic information and geotechnical data. Drillholes tend to be more common in areas of existing civil or commercial infrastructure as these projects often require geotechnical investigations.
Horizontal consistency is non-quantifiable. Considerable effort was made to digitize geotechnical drillholes within 40 feet of their locations as represented in drillhole reports/maps. In some cases, high precision was possible when coordinates were provided. The "Comments" field may note substantial uncertainties in geographic precision of a given drillhole point (typically water wells, which can range over 700 feet in geographic precision). Digitizing referenced various aerial photos, 1 meter lidar, taxlots, PLSS boundaries, and drillhole reports/map. No effort was made to quantify individual or cumulative error contributions from these sources.
Horizontal consistency
2013-12-31T00:00:00
Horizontal consistency is non-quantifiable.
Because of the irregular nature of point data used to create the TIN (from which this raster is derived) and the partly speculative nature of the subsurface extent of the geologic model unit, the completeness of the TIN model is variable and non-quantifiable. Qualititatively, water wells were largely not used in the modeling process because of the generally poor nature of their geologic report and considerable uncertainty locating them spatially.
2013-12-31T00:00:00
EPSG
7.11.2
Pixel
220
676
98.425200
98.425200
32
1
Upper Left
FALSE
LZ77
1
pixel codes
FGDBR
TRUE
Simple
FALSE
0
TRUE
FALSE
Warren Roe
Oregon Department of Geology and Mineral Industries (DOGAMI)
GIS Specialist
warren.roe@dogami.state.or.us
800 NE Oregon St., Suite 965
Portland
Oregon
97232
971-673-1555
Warren Roe
row and column
98.425200
98.425200
0
False
0
GEN_20_Shearwave
Feature Class
0
vector points
Warren Roe (author)
OBJECTID_1
OBJECTID_1
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
OBJECTID
OBJECTID
Integer
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Comments
Comments
String
50
0
0
Miscellaneous comments. May contain estimates of spatial accuracy, the presence of a hydrometer analysis of "fines" content, notes from the digitizing process, or other miscellaneous notes.
Warren Roe (author)
Miscellaneous comments. May contain estimates of spatial accuracy, the presence of a hydrometer analysis of "fines" content, notes from the digitizing process, or other miscellaneous notes.
LOG_ID
LOG_ID
String
40
0
0
Specifies the report from which the drillhole point was digitized. Report names themselves are unique; but since each report may contain numerous drillholes, "LOG_ID" is non-unique in this drillhole feature class.
Warren Roe (author)
Specifies the report from which the drillhole point was digitized. The majority can be categorized by the three largest contributors of drillhole reports.
MTL prefixes indicate a drilling report is from the City of Portland Bureau of Development Services and reflects their report-numbering scheme.
GT prefixes indicate a drilling report is from the City of Portland Bureau of Environmental Services and reflects their report-numbering scheme.
A four-letter county abbreviation (e.g. MULT, CLAC, etc) indicate a drilling report is from the Oregon Water Resources Division (OWRD) or the US Geological Survey (which copied and interpreted certain drilling reports from the OWRD).
Other report prefixes are generally from small report sets.
CPT
CPT
String
3
0
0
Indicates whether Cone Penetrometer geotechnical parameters were captured for a given drillhole.
Warren Roe (author)
Yes or No.
depth_dril
depth_dril
Double
8
0
0
depth_firs
depth_firs
Double
8
0
0
LOG_ID_sub
LOG_ID_sub
String
40
0
0
Grainsize
Grainsize
String
3
0
0
Indicates whether a grainsize test was performed for any sample in this drillhole. See also the "Comments" field, which may further specify if a hydrometer test was performed for fine-grained sediment.
Warren Roe (author)
Yes, No, or null. Null values indicate this test was not checked during digitization.
Atterberg
Atterberg
String
3
0
0
Indicates whether an Atterberg test was performed for any sample in this drillhole.
Warren Roe (author)
Yes, No, or null. Null values indicate this test was not checked during digitization.
Shape
Shape
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
Consolidat
Consolidat
String
3
0
0
Shear_Stre
Shear_Stre
String
5
0
0
LOG_ID_con
LOG_ID_con
String
80
0
0
SPT
SPT
String
3
0
0
Indicates whether an Standard Penetration Test (SPT) was performed during drilling. This field may be incomplete since the SPT field was added nearly halfway through the drillhole digitization effort. However, it is nearly ubiquitous in non-CPT geotechnical drillholes. Additional parameters, such as hammer weight and drop distance, were not digitized.
Warren Roe (author)
Yes, No, or RQD. RDQ is a non-SPT "rock hardness" attribute collected by some drillers when drilling through hard rock (in this project area, this was always basalt).
ELEV_pre_c
ELEV_pre_c
Double
8
0
0
shear_wave
shear_wave
String
3
0
0
Indicates whether shear-wave velocities were measured in the drillhole.
Yes or No.
Warren Roe (author)
Yes or No.
DH_TYPE
DH_TYPE
Integer
4
0
0