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Dulbahri Dulbahri
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Earth & Planetary Sciences

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Spot simulation for urban study Dulbahri Dulbahri
Indonesian Journal of Geography Vol 16, No 51 (1986): Indonesian Journal of Geogrphy
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.2166

Abstract

This paper discusses the SPOT simulation performances with Toulouse area as an example. An Overflight of the Toulouse area was made; resampling of 10 m and 20 m resolution combining with XS/ and XS2 in the creation of the simulation image was used in an effort to study Toulouse urban area. Manual interpretation without fieldchecks is used in this study. Toulouse urban land use can be distringuished and is easily delineated. Based on spectral characteristics, roof reflectance, road pattern, texture, and shape analysis the relative urbanization can be known. The relative network density can be measured so that the building and population density can be estimated using the SPOT simulation image.
Mapping of Marine Area Boundary of Central Java Province using Differential GPS Survey Method Nurul Khakhim; Dulbahri Dulbahri; Barandi Sapta Widartono
Forum Geografi Vol 16, No 2 (2002)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v16i2.603

Abstract

The development of GPS (Global Positioning System) technology which is measuring position by satellite, has taken a great metodology aspect of position on surface of earth. The standard GPS measurement takes an absolute positioning. To develop the accurate abd precision, it is used the differential method. Differential GPS measurement can be much more accurate than standard GPs measurement, wherever the method uses one receiver as base station/ reference and the other receiver as field station in a same time. That could reduce and eliminate drifts and errors. The aim of research is use the differential method of GPS survey to map the ocean boundary of Central Java Province. Physical data which neede are base line and base point. Base line were taken from obsrvation of longtime Landsat TM image band 5th based o opinion that shore line are clear seems and easy to interpreted at 10.00 am according to Landsat satellite reording time and the lowest tide time as base line. Location of lowest tide were selected at conspicuous place, such as cape, dry shore, etc and measured base on the BPN (Badan Pertahanan Nasional) base/ reference point (orde 2 and 3) on the district, with GPS differential metod. Twelve miles distance from base line of ocean bounddary is belong to province and 1/3 of is belong to district. Characteristic of marine landform as cape, bay, estuaria, attended to international rules. Final report of the research were 1) oean boundary map of Center Java Province, 2) the location and base/ reference points (orde 2 and 3) that could be reference as a base point differential method.
Co-Authors Barandi Sapta Widartono Nurul Khakhim