Multipurpose cadastre for campus room appraisal

The use of fundamental components of multipurpose cadastre which can be used as basic information and backbone for government policy with geographical information system as a tool are applied in this research method to appraisecampus room. The process to appraise of the facilities in a room begins with collecting facilities data which related to attribute data and defining room boundary which related to spatial data. Room appraisal are analysed by firstly calculate room valuebasedon facilities and activity hours.The method to calculate room value is comparison of quantity and functionality of facilities in every room. Thorough analysis is conducted to separate room value data containing human errors. The determination of which category (high, medium, low) every room fit in is based on distribution of value of every room value which is free of human errors. Room appraisal using this research method will lead to optimize every campus room especially low category room. This approach is also effective way to record number of rooms and facilities of campus comprehensively. Keywords: Multipurpose cadastre, Appraisal, Geographic Information Syste

Pembangunan Sistem Pengukuran Muka Air Otomatis (Automatic Water Level Recorder) Berbasis Gelombang Akustik Untuk Pengamatan Pasang Surut Laut

AbstrakPasang surut adalah fenomena naik turunnya muka air. Pasut dapat diukur dengan berbagai macam metode, baik manual maupu otomatis. Pengukuran otomatis dengan menggunakan alat pengukur pasut, khususnya untuk pengukuran jangka panjang dinilai relatif lebih berbiaya rendah dibandingkan dengan pengukuran manual, akan tetapi alat pengukur pasut otomatis hampir semuanya memiliki harga yang relatif mahal sehingga diperlukan peralatan yang lebih terjangkau dan andal. Pengembangan sistem automatic water level recorder (AWLR) berbasis gelombang akustik dilakukan dengan membangun dan merancang sistem perangkat lunak maupun perangkat keras alat dengan berbasiskan perangkat open source Arduino. Alat yang dihasilkan dapat mengukur dengan baik di skala laboratorium maupun lapangan. Pengukuran skala lapangan menunjukkan RMSE 36,6 cm di daerah terpencil dan RMSE 11 cm untuk daerah yang memungkinkan alat dipasang dengan stabil.Kata Kunci : AWLR, pengukur pasut otomatis, skala lapangan, skala laboratorium.AbstractTides were phenomenon of  rising water levels. Tides could be measured by various methods, manual or automatic way. Measurements using automatic tide gauges, especially for long-term measurements, usually needed lower cost compared to manual ones, but in facts automatic tide gauges were relatively more expensive prices, so it was worthy to develop the reliable equipment with lower cost. This automatic water level recorder (AWLR) system using acoustic waves was developed by building and designing a software and hardware system based on an open source device named Arduino. The builded equipment had could reached well level in scales, laboratory or field scales. Field scale measurements showed that RMSE in outlying areas reached 36.6 centimeters and could be better for areas where tide gauges could be installed stably (11 centimeters).Keywords: AWLR, automatic tide gauges, field scale, laboratory scal