2,025 research outputs found
An integrated study of earth resources in the State of California based on ERTS-1 and supporting aircraft data, volume 1
There are no author-identified significant results in this report
The 1981 Argentina ground data collection
Over 600 fields in the corn, soybean and wheat growing regions of the Argentine pampa were categorized by crop or cover type and ancillary data including crop calendars, historical crop production statistics and certain cropping practices were also gathered. A summary of the field work undertaken is included along with a country overview, a chronology of field trip planning and field work events, and the field work inventory of selected sample segments. LANDSAT images were annotated and used as the field work base and several hundred ground and aerial photographs were taken. These items along with segment descriptions are presented. Meetings were held with officials of the State Secretariat of Agriculture (SEAG) and the National Commission on Space Investigations (CNIE), and their support to the program are described
Sea turtle nesting activity along Eglin Air Force Base on Cape San Blas and Santa Rosa Island, Florida from 1994 to 1997.
Along EAFB on Cape San BIas, the only sea turtle species nest observed has been
the loggerhead turtle. The first green turtle nest documented along the Florida panhandle
coast was observed on EAFB property, however (D. Atencio, EAFB, pers. comm). Santa
Rosa Island, located approximately 150 miles west of Cape San BIas supports a small but
consistent, group of nesting green turtles (Fig. 2). Although erosion is not as severe along
Santa Rosa Island as it is on Cape San BIas, and vehicular traffic is not permitted, sea
turtles nesting on this barrier island must survive severe tropical storms, predation, and
artificial lighting to be successful. Because this area supports a rare group of nesting green
turtles and is disturbed by intense artificial lighting from Air Force missions and adjacent
resort towns, continued monitoring is necessary. The sea turtle species that nest along this
barrier island, and the human activities that disturb those sea turtles present unique
circumstances for management ofthis area. Protection ofthe significant nesting
populations of sea turtles on EAFB properties on Cape San BIas and Santa Rosa Island
requires yearly monitoring of the nesting activity and the natural and human disturbances
influencing the nesting females.
The objectives ofthis study were to monitor sea turtle nesting along EAFB on
Cape San BIas to determine number of nests and hatching success, assess disturbances,
and determine proper management to ensure successful nesting and hatching.(56 page document
POLLUTION SURVEILLANCE AND DATA ACQUISITION USING MULTISPECTRAL REMOTE SENSING 1
Large scale water resource investigations and effective pollution surveillance programs require the development of additional instrumentation and techniques to supplement existing methods of data acquisition. As a result, interest is growing in the concept of remote sensing. Described in this paper is the multispectral sensor concept and its application in water resource studies.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73841/1/j.1752-1688.1970.tb01651.x.pd
The Cape San Blas Ecological Study
Eglin AFB on Cape San Blas consists of approximately 250 acres located about
180 miles east of the main Eglin reservation. This area lies on the S1. Joseph peninsula,
part of a dynamic barrier island chain that extends across the northern Gulf of Mexico.
Due to the natural forces that formed Cape San Blas and those that maintain this area, St.
Joseph Peninsula has experienced severe land form change over time (see GIS land form
change maps). These changes allow for fluctuations in habitat types along Cape San Blas
(see GIS land cover change maps)that influence the floral and faunal species using this
area.
The dynamic environment along Cape San Blasincludes flatwoods, interdunal
swale, rosemary scrub, and beachfront. These habitats support a wide array of species,
including several threatened and endangered species such as the loggerhead sea turtle
(Caretta caretta), PipingPlover (Charadnus melodus), Least Tern (Sterna antillarum),
and Bald Eagle (Haliaeetus leucocephalus). Proper management of these species and their
habitats require knowledge of their abundance and distribution, and the effects
disturbances have on their survival.
In addition to threatened and endangered flora and fauna, Cape San Blas also
supports tourists and recreationists. Although Gulf County is sparsely populated, with
approximately 13,000 inhabitants throughout 578 square miles, summer tourism and heavy
recreational use of beaches for fishing, crabbing, and shelling place continued and
increasing pressure on the natural resources of these areas (Rupert 1991). Gulf County is
also one of the few remaining counties in Florida that permits vehicular traffic on its
beaches, including Cape San Blas. In addition to recreational use of these habitats;EAFB
also uses the area for military missions. Air Force property on Cape San Blas is primarily
used for radar tracking of flying missions over the Gulf of Mexico, although in recent
years it has been used for missile launchings and other various military activities.
To allow continued military and public use of Air Force property while also
protecting the unique flora and fauna of the area,EAFB proposed a characterization of the
resources found along Cape San Blas. A complete inventory of the physical features of the
area included investigating topography, soil chemistry, hydrology, archeology, and the
dynamics of land mass and land cover change over time. Various thematic layers within a
geographic information system (GIS) were used to spatially portray georeferenced data.
Large scale changes over time were assessed using stereo aerial photography. Vegetation
transects, soil samples, elevation transects, an archeological survey, freshwater wells, and
a tidal monitor were used to investigate the remaining features. (247 page document
An integrated study of earth resources in the State of California based on ERTS-1 and supporting aircraft data
There are no author-identified significant results in this report
An integrated study of earth resources in the state of California using remote sensing techniques
The University of California has been conducting an investigation which seeks to determine the usefulness of modern remote sensing techniques for studying various components of California's earth resources complex. Most of the work has concentrated on California's water resources, but with some attention being given to other earth resources as well and to the interplay between them and California's water resources
Use of ERTS-1 data in identification, classification, and mapping of salt-affected soils in California
There are no author-identified significant results in this report
Irrigated lands assessment for water management: Technique test
A procedure for estimating irrigated land using full frame LANDSAT imagery was demonstrated. Relatively inexpensive interpretation of multidate LANDSAT photographic enlargements was used to produce a map of irrigated land in California. The LANDSAT and ground maps were then linked by regression equations to enable precise estimation of irrigated land area by county, basin, and statewide. Land irrigated at least once in California in 1979 was estimated to be 9.86 million acres, with an expected error of less than 1.75% at the 99% level of confidence. To achieve the same level of error with a ground-only sample would have required 3 to 5 times as many ground sample units statewide. A procedure for relatively inexpensive computer classification of LANDSAT digital data to irrigated land categories was also developed. This procedure is based on ratios of MSS band 7 and 5, and gave good results for several counties in the Central Valley
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