USGS Geoscience Data Catalog
Additional USGS Geoscience data can be found by geographic location or by publication series.
"The pit location maps show the location of all
pits bearing Materials Services serial numbers.
Other sources are not shown. The plotted locations
are as close as possible to the true location
as the scale of the map will allow."
The point attribute data, captured from the Source pit
data sheets are
"designed to show test results (sieve analysis,
plasticity index, and abrasion) for the usable
material within each ADOT pit."
Hirschberg, Douglas M. (Digital Compiler), Pitts, G. Stephen (Digital Compiler), Melcher, Henry L.(Digital Compiler), and Bliss, James D. (Digital Editor), 20010420, Digital data for construction material sources reported by the Arizona Department of Transportation in 1977 for Maricopa County, Arizona: U.S. Geological Survey Open-File Report 01-122, U.S. Geological Survey, Tucson, AZ.Online Links:
This is a Point data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 65.249909375
Ordinates (y-coordinates) are specified to the nearest 65.249909375
Planar coordinates are specified in Feet
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
ITEMS IN MARPITS1.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 4 12 F 3
5 PERIMETER 4 12 F 3
9 MARPITS1# 4 5 B -
13 MARPITS1-ID 4 5 B -
17 PITNUM 5 6 C -
22 ORDER 4 5 I -
26 MAP 2 3 C -
28 QTR 2 3 C -
30 SEC 2 3 C -
32 TWP 3 4 C -
35 RNG 3 4 C -
38 HI_CLASS 4 5 C -
42 MATERIAL 30 31 C -
72 PI 4 5 C -
76 ABR_500 4 5 I -
80 SWELL_24 7 8 N 2
87 THR_QTR 4 5 I -
91 NUM_4 4 5 I -
95 NUM_8 4 5 I -
99 NUM_40 4 5 I -
103 NUM_200 4 5 I -
107 SOURCE 4 4 I -
BRIEF EXPLANATION OF ITEMS ADDED BY THE AUTHORS TO THE
MARPITS1 POINT DATA SET:
(items automatically generated by ArcInfo not detailed)
---------------------------------------------------------
PITNUM -The pit number of the location.
ORDER -The ascending numeric order of the pit number.
MAP -The map sheet (from Source) of the pit.
QTR -Public Land Survey quarter-section or half-section of
the pit location. nw = northwest, ne = northeast,
sw = southwest, se = southeast, w2 = western-half,
n2 = northern-half and so on.
SEC -Public Land Survey section of the pit location.
TWP -Public Land Survey township of the pit location.
RNG -Public Land Survey range of the pit location.
HI_CLASS -Highest classification for material found in the pit.
The following are the highest class designations for
test data representing at least half or more of the
total depth of the pit:
MA--mineral aggregate
AB--aggregate base
SM--select material
BR--borrow, no limits set
CM--cover material (no specification provided)
SB--special backfill (no specification provided)
SS--subgrade seal
UK--unknown
MATERIAL -Material types (clay, sand, gravel, caliche, etc.
Abreviations used for various materials found in
each pit: [Classification scheme includes a mix of
material types (ash, caliche, cinder, clay) and
classification of material by size (boulders, silty)]
ASH--ash; AND--andesite; BLDR--boulders;
BST--basalt, malpais; CAL--caliche; CDR--cinders;
CGM--conglomerate; CKR-clinkers; CLY--clay;
COB--cobbles; DEC--decomposed; DIRT--dirt;
GTE--granite; GVL--gravel; GYP--gypsum; LAV--lava;
LOM--loam; LST--limestone; PUM--pumice; RCK--rock;
RHY--rhyolite; SH--shale; SLT--silt; SLTY--silty;
SND--sand; SS--sandstone; TRAV--travertine
*Note that many of these abbreviations may not be
found in the data as this list is applicable to data
for all counties for which data has been collected.
PI -(Plasticity Index) A measure of sensitivity that aggregate
has to moisture change and is important when aggregate is
used in Portland cement or asphalt concrete. White (1991,
p. 13-42) defines PI as "the difference in the Atterberg
liquid limit and plastic limit moisture contents." It is a
value without a unit. A PI of 4 is the maximum allowed as
stipulated in American Society of Testing Material (ASTM)
test D 3515 for materials used in asphalt concrete mixtures
(White, 1991). The Arizona Highway Department (1972) used
several PI standards. These include ones where PI was not
detected or was to be less than 5 or 10 depending on
aggregate classification. Testing was to be executed in
accordance with the requirements of American Association
of State Highway and Transportation Officers T 90
(AHD, 1972). Maximum allowable PI values are dependent on
which of the 50 categories of aggregate types are in effect.
When testing determined no PI, a "NP" (no plasticity) was
entered in the ADOT (1977) table. The Open-File Report
authors have changed all these "NP" to zero and entered
-999 when fields were without values.
ABR_500 -Los Angeles (LA) abrasion test (500 rotations).
The test used to evaluate the resistance of a coarse
aggregate to degradation by abrasion and impact is the
Los Angeles abrasion test (Meyer and Zeinak 1991).
In accordance with ADOT (1990, p. 718) standard
specifications "the percent of wear of coarse aggregate
at 500 revolutions, when tested in accordance with the
requirements of American Association of State Highway
Transportation Officials (AASHTO) test T 96, shall not
exceed 40." The same requirement is also specified for
the class of aggregate 1 to 4 for material used in
subbases and bases (ADOT, 1990, p. 140). The detail of
Los Angeles abrasion testing procedures may have
changed so the results found in this data release may
not be consistent with current specifications.
Los Angeles abrasion test results are found in just 8
percent of the pits listed in the inventory.
SWELL_24 -Volume change--swell (24 hours).
Data are available giving maximum 24-hour volume
change (AHD, 1972). Procedures and standards
applicable at the time of the test are not given in
the inventory but likely may have been AASHTO 101,
Method B (AHD, 1972, Table 703-1 and 704-1). These
specifications set the maximum allowed volume increase
to 0.06. This is the maximum for all classes of
mineral aggregate and one class of aggregate used for
cover materials and slurry seal.
THR_QTR -Percent material passing the 3/4 inch sieve. Materials
passing the 3/4 inch mesh sieve are 19 mm or less.
NUM_4 -Percent material passing the no. 4 sieve. Materials
passing the no. 4 mesh sieve are 4.75 mm or less.
NUM_8 -Percent material passing the no. 8 sieve. Materials
passing the no. 8 mesh sieve are 2.338 mm or less.
NUM_40 -Percent material passing the no. 40 sieve. Materials
passing the no. 40 mesh sieve are 0.42 mm or less.
NUM_200 -Percent material passing the no. 200 sieve. Materials
passing the no. 200 mesh sieve are less than 0.074 mm.
SOURCE -Numeric value that relates to marpits1.ref look-up
table giving information on the Source.
The authors wish to thank Michelle Perez for helping in the capture of the attribution data and Richard Ahern, Arizona State Land Department, for reviewing the data presented in the marpits1 data set with the data in the Source pit data sheets.
(520) 670-5502 (voice)
(520) 670-5571 (FAX)
jbliss@usgs.gov
U. S. Geological Survey scientists desired to have the data presented in the Source in a digital format to use in GIS and spreadsheet software programs for aggregate models and aggregate assessment.
Materials Services, Arizona Department of Transportation, H, 1977, A Materials Inventory of Maricopa County (Arizona): Arizona Materials Inventory none, Reproduction Section, Arizona Department of Transportation, Phoenix, Arizona.
Attribution data captured from the Source pit data sheets
were compared to the Source to check for typographical
errors. Hard copy maps were produced with the pit number
labeled for each pit location and manually checked.
Pit locations were infrequently found to have legal descriptions
in the Source pit data sheets inconsistent with the displayed pit
location on the Source map sheets. No attempt was made to update
the legal descriptions shown in the Source pit data sheets.
Maps prepared using the digitized points overlain on the Source map sheets on a light table and suggest that the locational accuracy for the digitized points is no better than 2 millimeters (1175 feet or 358 meters at scale). Plots of the pit locations over a Public Land Survey sections GIS data set available form the Arizona State Land Department produced maps to display pit locations within PLSS sections. The result showed consistent locational fidelity between pit location and PLSS quarter-section in the digital data as compared to the Source.
All pit locations depicted on the Source map sheets or with a record in the Source pit data sheets were captured.
Point features present. Points were digitized at the center of each symbol representing a pit location on the Source map sheet. Where two or more pit number labels pointed to the same symbol a point was added for each of the labels, thus some points will overlap when displayed at the scale at which the data were digitized (1:176,306). In some cases one of the points may have been digitized slightly off-center.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- These data are not to be used at scales greater than 1:176,306. Any data sets or hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way he or she is obligated to describe the types of modifications he or she has performed. User specifically agrees not to misrepresent these data sets, nor to imply that changes he or she made were approved by the U.S. Geological Survey or the Arizona Department of Transportation (ADOT).
1-303-202-4200 (voice)
1-303-202-4693 (FAX)
The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS.
These data are not meant to be used or displayed at any scale larger than 1:176,306 (e.g. 1:100,000 or 1:24,000).
| Data format: | Attributed point data in format ARC/INFO Export format, Adobe PDF (version ArcInfo 7.2.1) Size: 0.3 MB |
|---|---|
| Network links: |
<http://geopubs.wr.usgs.gov/open-file/of01-122> |
(520) 670-5511 (voice)
(520) 670-5571 (FAX)
rafields@usgs.gov
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://geo-nsdi.er.usgs.gov/metadata/open-file/01-122/metadata.faq.html
Page Contact Information: Peter Schweitzer
Page Last Modified: Monday, 10-Nov-2008 12:18:47 EST