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Mclaurin, J. D.

English

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E 7.5- 1 0. 1. 5.
CARTOGRAPHIC EVALUATION OF SKYLAB S-192 SCANNER INAGES
" ade available under NASA sponsorslp
in the interest of B:r y i' ' . " s-
EREP Investigation Number 497 semination of Earth Resouices Survey
Program inorma"i on ~ ! vWvaiiout iadility
tor any use made thereot."
Period Covered: 1 November 1974 - 31 January 1975
NASA n:rchase Order T-4111B
Principal Investigations Management Office
Lyndon B. Johnson Space Center
Technical Monitor: Rigdon Joosten, Code TF6
Principal Investigator:
John D. McLaurin
U.S. Geological Survey
National Center, Stop #507
Reston, Virginia 22092
Quarterly Progress Report
(E75-10156) CARTOGRAPHIC EVALUATION OF N75-19780
SKYLAB S-192 SCANNER IMAGES Quarterly
Progress Report, 1 Nov. 1974. -31 Jan. 1975
(Geological Survey, Reston, Va.) 7 p HC Unclas
3.25 CSCL 088 G3/43
- 00156
Publication Authorized by the Director, U.S. Geological Survey
https://ntrs.nasa.gov/search.jsp?R=19750011708 2020-03-22T23:44:03+00:00Z
(a) Overall Status
Since the last quarterly report (1 August 1974 - 31 October 1974)
the following data have been received:
Data Task Site Location Date Received
SL3 S-192 933699 Chesapeake Nov. 12, 1974
bands 3,5,7 Bay
conical & line
straightened
Prod 55-1
SL4 S-192 933136 San Francisco Nov. 21, 1974
bands 4,7,9
Prod 55-1
SL4 S-192 933548 Southern Nov. 21, 1974
bands 4,7,9 California
Prod 55-1
SL4 S-192 933136 San Francisco Dec. 3, 1974
bands 4,7,9
color composite
Prod 55-3
SL4 S-192 933548 Southern Dec. 3, 1974
bands 4,7,9 California
color composite
prod 55-3
SL4 S-192 933136 San Francisco Jan. 13, 1975
bands 4,4,6,6,7,7
11,11,12,12,13-2,
13-2, 8,9, 13-1
SL3 S-190B 933548 Southern Nov. 25, 1974
2x Transparencies California
Mag 83 150/173
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Data Task Site Location Date Received
SL3 S-190B 933699 Chesapeake Nov. 25, 1974
2x Transparencies Bay
Mag 86 294/305
SL4 S-190B 933396 Sioux Falls Jan. 9, 1975
2x Transparencies
Mag 93 206/213
SL4 S-190B 933136 San Francisco Jan 9, 1975
2x Transparencies
Mag 92 333/344
.The above S-192 imagery is the first to be received that looks adequate
for the experiment. Inparticular, the imagery for Task site 933136 San
Francisco and 933548 Southern California looks excellent. The film has
been screened and the 7 1/2-minute topographic maps that cover the areas
are being selected. Further work for this investigation will be limited
to these two Task sites. The Task site 933669 Chesapeake Bay imagery is
of low contrast and therefort not useable for this experiment.
The only significant progress to report at this time is the receipt and
screening of the S-192 imagery.
i(b) Action Required
The present period of performance for the investigation is until March
31, 1975. On January 20, 1975 a request to extend the period of perfor-
mance to June 30, 1975 was sent to the Technical Monitor. This extension
is the minimum required to complete the major objectives of the experi-
ment.
(c) Expected Accomplishments During Next Reporting Period
Based on an extension of the period of performance to June 30, 1975 a
revised mile stone schedule and task descriptions have been prepared for
the investigation (copy enclosed). Assuming no major problem in the
measurement program all of the point measurements should be completed dur-
ing the next reporting period along with some of the preliminary analysis.
-3-
(d) Significant Results
None
(e) Suninary Outlook for Remaining Effort
With the time remaining for this investigation the primary focus will
be on the measurements and analysis of the cartographic accuracy of the
S-192 imagery received from NASA. Based on these measurements and this
analysis a decision will be made as to whether a more comprehensive
study including computer modelling of th R-192 scanner geometry is war-
ranted. If the decision is to do the further study an additional exten-
sion of the period of performance will be requested.
(f) Travel Summary and Plans
No travel was done by the PI for this Investigation during the reporting
period and none is planned for the next quarter.
Skylab EPED Investigation No. 497
.Milestone Schedule
1. Acquire maps for San Francisco Ii
and Imperial Valley test sites
2. Select image points for testing
black and white and composites
3. Derive ground coordinates for -
4. Measure image coordinates of 1
test points 1
processing /
6. Do initial data processing
and generate vector plots
7. Complete preliminary analysis
and decide if more detailed
study is warranted*
8. Prepare first draft - Final
Report
9. Review and complete Final
Report ___
January February March April May June
*If a more detailed study is
warranted a time extension
will Le requested
Skylab EREP Investitigtion No. 497
Task Description
,.
1, Acquire maps for San Francisco and Imperial Vally, test sites.The most recent 7A minute quadrangles coveri~ two test
sites will be identified and copies of the iptheropriate apswill be pulled from the RT-F files. The San Francisco andVicinity 1:125,000 scale topographic maps and the south halfof the California state base at 1:500,000 sca l
used for orientation.0 scale ill also be
2. Select image points for testing black and white and color com-posites.
For each test site the materials received from NASA includeblack and white copies of single bands and a color compositeof bands 4, 7 and 9. Image points that can also be locatedon the maps will be selected and marked on the imagery andthe maps for the best black and white band and the color com-posite for each of the two test sites. Skylab S-190A andS-190B photographs of the test sites are also available asan aid in selecting control points. Approxime y twenty-fivewell distributed points will be selected for each test site.
3. Derive ground coordinate for the test points.Either the Data grid digitizer or a coordinatograph will beused to measure coordinates of all test points and UTHi tickson the maps. Computer processing will be required to derivethe final UTi coordinates for the points.
4. Measure image coordinates of the test points.
Te image points and the scan line tick marks on each imagewill be measured on a 4I.ann comparator. Four sets of meas-urements should be made for each image. For this experiment
a total of four different images will be measured.
5. Select computer programs for processingComputer progrns from those available in RT will be reviewedand the best one for this experiment will be used. The pro-gram must be capable of perfo-in a linear tro;-sformation
and polynomial transformations of different degrees. e finaloutput will include transformation parameters, transformed posi-tions, rediduals and a calcomp vector plot of the residuals.
-2-
6. Do initial data processing and generate vector plots.
The data will be processed through the program and the vector
.,:plots will be generated.
7. Complete preliminary analysis of results and determine if a more
detailed study is warranted.
The analysis will determine the cartographic potential of the
S-192 iurltispectral scanner images. This will include the
accuracy of locating points and of making measurements on the
images. Any systematic errors in the imagery will be identi-
fied for possible use in developing .--. ection algorthms.
There will be no attempt during this phase of the experiment
to develop a computer program to use spacecraft attitude to
improve the geometric quality of the imagery. As a result of
the preliminary analysis a decision will be cade whether a
more detailed analysis including computer modeling of the
scanner geometry is warrented. If the decision is to conduct
additional studies NASA will be requested to extend the in-
vestigation.
ORIGINAL PAGEgOP Poo QUAL


Cartographic evaluation of Skylab S-192 scanner images

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