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Abstrak :
Geographic Information Systems (GIS), with its capability in integrating spatial and attribute data, becomes important means in visualisation and analysis built environment. Good visualization capability of GIS has made this technology an important communication tool. In this research, a 3D City Block Model of Simpang Lima Area has been made. This research make us of digital topographic map of Semarang, scale 1:5000 which cover Simpang Lima and its surrounding.Digital terrain model of the area was made by interpolate contour lines and spot hights. ArcView 3.2a with 3D analyst extension was used to construct buildings block model. Result from 3D Analyst when then exported into VRML format (Virtual Reality Modeling Language). Buildings block model in VRML format could be viewed using Internet Explorer ver. 5.0 or later, if it is equipped with Cosmo Player plug in. A 3D City Block Model of Simpang Lima Area, has been obtained. Users can be obtain information about characteristic of each building in the study area. Users can simulate if a new building have been built and see the effect to the visibility to its surrounding. Use of VRML format has advantages that users who do not have GIS software can still explore the virtual 3D city model interactively; even they can define their own direction of 'virtual walking'.

Abstrak :
Perencanaan tata ruang sebagai dasar pembangunan suatu wilayah, memerlukan informasi spasial yang akurat dan lengkap agar hasil perencanaan tata ruang yang dihasilkan tepat sasaran. Peta dasar rupa bumi sebagai informasi spasial utama di Indonesia pada umumnya menggunakan sumber data foto udara. Perkembangan teknologi penginderaan jauh akhir-akhir ini telah dapat mengasilkan citra satelit dengan resolusi spasial yang tinggi. Salah satunya adalah Citra ALOS PRISM dengan resolusi 2.5 m. Pemetaan rupa bumi skala 1:25.000 menggunakan Citra ALOS PRISM tersebut menghasilkan peta rupabumi dengan tingkat akurasi Horizontal (x,y) yang baik secara relatif terhadap peta RBI (Rupa Bumi Indonesia) skala 1:25.000 dan secara absolut terhadap hasil pengukuran di lapangan. Sementara tingkat akurasi vertikal-nya dapat memenuhi standar pemetaan nasional hanya pada wilayah topografi datar tetapi tidak dapat memenuhi standar pada wilayah topografi bergelombang dan bergunung.

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Spatial planning as the foundation of spatial development needs the accurate and complete spatial information so the results could meet the aim. Topographic map is one of the main spatial information that generally uses the source of the aerial photograph data. Recent development of remote sensing technology produce the satellite image with the high spatial resolution. One of them is ALOS PRISM with the spatial resolution 2.5 m. Topographic mapping at various topographic area using ALOS PRISM image has produced map at scale 1:25.000 with the level of the Horizontal accuracy (x,y) that was relatively good against the RBI map at the scale 1:25.000 and absolutely towards ground-surveyed reference points. While the level of it?s vertical accuracy could meet the standard of the national mapping only on the flat area but could not meet the standard on undulating and mountainous area.

Abstrak :
Banjir merupakan bencana yang hampir setiap tahun terjadi di wilayah-wilayah Indonesia, salah satunya Kabupaten Karawang. Analisis Penginderaan Jauh menjadi penting dilakukan untuk mengetahui persebaran daerah yang berpotensi banjir dengan memperhatikan aspek geomorfologi dikarenakan lebih efisien, murah, dan jangkauannya luas. Berdasarkan topografi dan morfologinya, Kabupaten Karawang sebagian besar merupakan dataran yang relatif rendah dengan variasi ketinggian antara 0-5 mdpl, terdiri dari dataran, perbukitan, dan pegunungan dengan dominasi kemiringan lereng 0-2%. Metode yang digunakan adalah metode penginderaan jauh menggunakan data satelit Himawari-8 yang nantinya digabungkan dengan data lain seperti data indeks banjir dari BNPB dan data administratif dari BIG. Setelah itu, data diolah menggunakan perangkat lunak ArcGIS 10.4 yang meliputi pembuatan peta potensi banjir dan peta geomorfologi. Hasil Analisis menunjukkan bahwa daerah penelitian memiliki morfologi dominan berupa dataran rendah dengan kemiringan lereng 0-2% yang mencapai kurang lebih 75%. Selain dataran rendah, terdapat morfologi perbukitan dan pegunungan dengan elevasi 50 sampai lebih dari 1000 mdpl dengan kemiringan lereng bervariatif antara 2-140%. Untuk persebaran daerah potensi banjir, didapatkan hasil bahwa dari 30 kecamatan yang ada di Kabupaten Karawang, hanya dua kecamatan yang tidak berpotensi banjir, yakni kecamatan Ciampel dan Kota Baru. Secara kuantitatif, potensi kejadian banjir yang terjadi di Kabupaten Karawang pada Mei 2019 sebesar 36 potensi kejadian dengan jumlah terbanyak terdapat pada minggu ketiga sebesar 11 potensi kejadian

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Flood is a disaster which occurs almost every year in some of Indonesian regions, one of them is Karawang Regency. Remote Sensing Analysis is important to know the distribution of areas that have the potential to flood by paying attention to geomorphological aspects because it is more efficient, inexpensive, and has a wide range. Based on the topography and morphology, Karawang regency is mostly a relatively low plain with a height variation between 0-5 meters above sea level, consisting of plains, hills, and mountains with the dominant slope of 0-2%. The method used is a remote sensing method using Himawari-8 satellite data which will be combined with other data such as flood index data from BNPB and administrative data from BIG. After that, the data is processed using ArcGIS 10.4 software which includes making flood potential maps and geomorphological maps. The analysis shows that the study area has a dominant morphology in the form of lowlands with a slope of 0-2% which reaches approximately 75%. In addition to the lowlands, there is morphology of hills and mountains with elevations of 50 to more than 1000 masl with slope vary between 2-140%. For the distribution of potential flooding areas, the results obtained are that from 30 sub-districts in the Karawang regency, only two sub-districts have no potential for flooding, such as Ciampel and Kota Baru sub-districts. Quantitatively, the potential for floods that occurred in Karawang Regency in May 2019 was 36 potential floods with the most number being in the third week of 11 potential floods