Journal of Applied Geospatial Information 2022-05-24T06:09:45+00:00 Muhammad Zainuddin Zainuddin Lubis, S.Ik., M.Si Open Journal Systems <p>Journal of Applied Geospatial Information (JAGI) is a national&nbsp;and international peer review journal published by Politeknik Negeri Batam.&nbsp;The JAGI&nbsp;is issued 2&nbsp;times a year in electronic form, publishes Original Research Articles (full papers and short communications) and Review (full and mini-reviews) in all aspects of result research in the field of science/engineering: terrestrial and marine (geomatics, geophysics, geography, geology, geographic information systems, remote sensing, cartography, oceanography, hydrography, marine science and technology).&nbsp;We encourage all interested contributors to submit their work for consideration.&nbsp;<a href=";1488529534&amp;1&amp;&amp;">e-ISSN (Online):&nbsp;2579-3608 </a>; <a href=";container-title=Journal+of+Applied+Geospatial+Information">DOI:&nbsp;10.30871/jagi</a></p> Focal Length Lens Effect at Non-Metric Camera for Three-Dimensional Models Result 2022-02-24T08:38:29+00:00 Nur Alfan Wisnu Hardiatmojo Martinus Edwin Tjahjadi Fransisca Dwi Agustina <p>Selections of non-metric cameras can be calculated properly starting from choosing the right camera sensor size and lens focal length to get better results. Differences in the choice of focal length in shooting can affect the resulting photo. The resulting photo may differ from how much of the object is captured and may suffer distortion due to different selections of the focal length. The purpose of this study is to show the magnitude of the effect of focal length variation in making a three-dimensional model based on the comparison of the results of the three-dimensional model visualization, the comparison of the results of geometric accuracy based on the independent checkpoint coordinate data, and the comparison of the distance results between retro targets. The results of this study indicate that a focal length of 70 mm has better results with the formation of the object completely resembling its original object compared to a focal length of 28 mm which is not good at forming a safety pillar on the bridge. The results of the RMSE value based on ICP coordinate data at a focal length of 70 mm are better with a value of 0.083 m compared to a focal length of 28 mm with a large value of 0.123 m. The results of the RMSE value based on the distance between retro targets at a focal length of 70 mm are better with a value of 0.003 m compared to a focal length of 28 mm with a large value of 0.004 m.</p> 2022-01-31T00:00:00+00:00 ##submission.copyrightStatement## Alteration Characteristics and Precious Metal Availability in Gunung Gembes & Surroundings, Jeruk Village, Pacitan Regency, East Java Province 2022-02-11T14:52:19+00:00 Radhitya Adzan Hidayah I Gusti Ngurah Adi Prasetiya Nurul Adzan Dzakiya <p>The research area is located in the area of Mount Gembes, Jeruk Village in Pacitan (East Java). This study aims to determine the characteristic and temperature in the formation of alteration which refers to petrography with the help of samples taken in the study area. The petrographic observations carried out were thin section observations which were then analyzed for the mineral content contained in the sample rock. After knowing the minerals contained in the sample rock, it is then entered into the mineral formation temperature diagram (White &amp; Hedenquist, 1995). The method used in this study includes primary data in the form of geological observations such as lithology, geological structure geomorphology, environmental geology and alteration observations and combined with secondary data. Alteration observations in this study were carried out descriptively (megascopic) and subjective (microscopic). The geomorphic unit that works is of volcanic origin, with high hilly sub-units of porphyry dacite intrusion (volcanic neck). Geological structures that develop in the study area are faults, namely the left horizontal fault of Jeruk 1, the left horizontal fault of Jeruk 2 and the interpretation of the oranges right horizontal fault. Geological resources or sources found in the research area are mineral potential resources that are economical, and negative sources are in the form of mass movement of debris flow type. The Zonation and the type of alteration that developed in the research area are the clay alteration zone and silicification. The clay zone is formed at a temperature &gt;100⁰C-220⁰C with a pH of 3-5 and a silicification zone is formed at a temperature&gt;100⁰C-300⁰C with a pH &lt;2 which is directly controlled by the faults found in the study site.</p> 2022-02-11T14:52:18+00:00 ##submission.copyrightStatement## Land Surface Temperature and its Relationship to Population Density 2022-02-20T13:26:05+00:00 Mita Apriana Erliza Syahrani <p><em>Population density due to urbanization contributes to the SUHI phenomenon and urban climate change. Understanding the SUHI phenomenon that brings enormous negative impacts to the environment and human life, Land Surface Temperature (LST) assessment is essential for creating a feasible and livable city. By utilizing the data of 1999 and 2018, this study aims to assess the LST value and its relationship to population density in Tanjungpinang city over two decades. As an island, Tanjungpinang has a vulnerability to SUHI and the climate change phenomenon. This study applied GIS and remote sensing models based on the mathematical formula of digital remote sensing images to calculate the LST value, and the relationship between LST and population density was examined using correlation analyses with Microsoft Excel. The results showed that Tanjungpinang city had increased 3.5oC in LST and 94.80% in density population over two decades. SUHI phenomenon has occurred during this period. It also indicated that there was a significant relationship between population density and LST. The LST spatial pattern spread from west to east of Tanjungpinang city was in line with the population density distribution pattern. The area with the highest percentage of population density addition and experienced the highest LST was Tanjungpinang Barat District. This study considers local governments to create effective population control and adaptive planning strategies for SUHI phenomenon mitigation.</em></p> 2022-02-20T13:26:05+00:00 ##submission.copyrightStatement## GIS Application for Modelling Erosion Hazard in Batam Island 2022-03-16T15:20:19+00:00 Luthfiya Ratnasari Fara Nabila Rossa <p>Soil erosion disaster is a disaster that occurs simultaneously with landslide events that occur due to the destruction of the soil layer which then causes erosion followed by landslides. The phenomenon of land erosion occurs due to high rainfall, the influence of slopes and slope length, as well as due to development resources according to Mamarodia (2014). Erosion can also occur due to land degradation, namely the loss of organic matter and nutrients from the root area, this study aims to determine the erosion hazard model in Batam Island which can be displayed in the form of a RUSLE model by utilizing a geographic information system (GIS). The data used in the form of slope maps, land use maps, maps of soil types and rainfall maps on Batam Island using the data processing method used is the RUSLE method to provide information in the form of erosion hazard categories and produce a two-dimensional erosion hazard model map. The result is a map of the erosion hazard model in a two-dimensional form with categories obtained from the combination of the four maps that have been classified. The results of this research are information on the area of ​​soil erosion with very light categories (24,200.42 Ha), light (5,488, 20 Ha), medium (5,100.42 Ha), heavy (3,029.43 Ha), and very heavy (2,929.64 ha) spread over Batam Island. The slope with the highest slope height is class 129,284 ft to 148,627 ft, and the lowest height elevation is in class -6,11 ft to 13,232 ft. the Batam area tends to have an area with an elevation of 13,232 ft to an altitude of 32,574 ft.</p> 2022-03-16T15:14:35+00:00 ##submission.copyrightStatement## Estimation Precipitable Water Vapor Using (PWV) The Permanent Single GPS Station in Makasar and Bitung, Indonesia 2022-04-19T15:35:30+00:00 Syachrul Arief <p>Meteorological investigations using global positioning systems (GPS) are based on permanent networks that are expensive to develop globally on Earth. In this study, it was confirmed that a single station GPS meteorology was feasible where there was no possibility for the development of a sophisticated, reliable GPS network. In Sulawesi, there are several GPS stations since 2009 GPS stations have been installed in Makassar and Bitung by the Indonesian Geospatial Information Agency, in which meteorological sensors are also installed in the station. GPS data is processed to estimate the total zenith delay (ZTD) of GPS signals in the troposphere. The ZTD estimate is then automatically converted to stored water vapor (PWV) using goGPS software. Two types of validation were applied to the PWV estimation. All of them proved the validity of the GPS results: (1) PWV was measured using radiosondes in Makassar and Bitung with almost the same climate regime, each showing a correlation of 96.5 and 83.0% with GPS PWV time series.&nbsp; (2) a global reanalysis dataset was showing correlations of 60.1 and 75.3%, respectively, with GPS results. This validation shows that a permanent GPS network can be an alternative to get temporally more detailed and accurate meteorological data and lower costs and time-saving operations.</p> 2022-04-19T15:32:11+00:00 ##submission.copyrightStatement## Drone LiDAR Application For 3D City Model 2022-04-19T16:15:10+00:00 Afradon Aditya Setyawan Muhammad Iqbal Taftazani Syamsul Bahri Erma Dwi Noviana Maritsa Faridatunnisa <p>The availability of spatial information in 3D in a city that will apply the smart city concept is minimal or even non-existent. This makes the information conveyed less clear and less accurate. 3D map presentation is an indispensable component in the visualization of smart cities. The acquisition of spatial information in 3D can use several methods, one of which is the LiDAR (Light Detection and Ranging) drone. The Drone LiDAR is one of the new technologies in mapping surveys. Initially, LiDAR technology used a manned aircraft and had very large dimensions. Technological developments have made LiDAR portable using drones. Data acquisition was carried out using a multirotor-type Drone LiDAR from microdrones with a flying height of 60 meters above the ground. An area of ​​6 hectares in the Bulaksumur UGM area is the object of research for the 3D city model building. The objects mapped would range from one-story to five-story buildings. The results of data acquisition in the form of a point cloud are then modeled into a 3D building with the micro station software plugin Terra Solid and Terra Model. Modeling is done using automatic and manual methods. The results obtained are in the form of a 3D city model with a LOD 2 level of detail. The amount of vegetation in the mapped area makes the point cloud detail on the front side of the building less dense. However, the accuracy obtained is quite high, ranging from 0,4 to 5,1 cm, making it suitable for making 3D city models with LOD 2 detailed specifications.</p> 2022-04-19T16:15:10+00:00 ##submission.copyrightStatement## Measurement and Analysis of Target Strength of Tiger Grouper Fish (Epinephelus fuscoguttatus) Using Acoustic Methods in Lancang Island Seawater 2022-04-22T16:04:24+00:00 Agustina Sartika Yos Ekaristi Manik Henry Munandar Manik Totok Hestirianoto <p>Coral fish are organisms with the largest amount of biomass and are also large organisms that can be found in coral reef ecosystems. The tendency of coral fish is that they do not move around and are always in a certain area and are very relocated although still many (Nybakken, 1988). The coral fish that are often found on the island of Lancang is the Tiger Grouper fish (Epinepheus fuscoguttatus). Grouper fish have a high economic value if fishermen do good cultivation on this Lancang island. The method used was mobile and controlled hydroacoustics, located in Pulu Lancang Thousand Islands. The instruments used are SIMRAD EK 15. The number of samples measured as many as 3 heads with a total length ranging from 21,70 cm to 42,50 cm and has the total weight of the three fish of 186,9 gr to 640 gr with a recording time of 5 minutes was done at the Dock and Floating Net Cage. The sounding results of tiger grouper were then analyzed using Echoview 4.0 and microsoft excel. The results of the analysis showed the average TS value in 3 tiger groupers whose total length ranged from -34,77 dB to -32,37 dB and the longer the total length of the fish, the greater the TS value.</p> 2022-04-22T16:04:24+00:00 ##submission.copyrightStatement## Application of Generalized Additive Model for Identification of Potential Fishing Zones Using Aqua and Terra MODIS Imagery Data 2022-05-13T14:54:39+00:00 Bandi Sasmito Nurhadi Bashit Bella Riskyta Arinda Abdi Sukmono <p>Remote sensing applications can provide information on oceanographic conditions for identification of potential fishing zones by combining statistical approaches. Determination of fish catch zones needs to be studied on the relationship between oceanographic parameters and fish catches to improve the efficiency and effectiveness of fishing operations by fishermen. Based on this, identification of potential fishing zones needs to examine the relationship between fish catches and oceanographic parameters using the Generalized Additive Model (GAM) in the Java Sea. GAM analysis was carried out using fish catch data as response variables and oceanographic parameters such as sea surface temperature (SST) and chlorophyll-a image processing results from MODIS, SSS from CMES, and Depth data as predictor variables. The selection of the best model is determined by the highest percentage of CDE and the lowest AIC. GAM modeling results show that 60.3% of fish catches in the Java Sea are influenced by oceanographic factors and 39.7% by other factors. The oceanographic parameter that has the most influence on fish catches is the concentration of chlorophyll-a. GAM modeling results show that fish in the Java Sea tend to be found in sea that have chlorophyll-a concentrations of 0.2 mg/m3 – 0.5 mg/m3, SST 280C – 310C, salinity 31.8 PSU – 33 PSU, and a depth of 20 m. – 50 meters. Potential fishing zones were identified based on the results of the GAM modeling analysis. Potential fishing zones in the Java Sea from March 2021 to June 2021 have varying spatial distributions. The results of the most fishing potential zones were found on June 3, 2021, which were distributed the most in the sea around Pulau Laut, in the southern part of the island of Borneo, and the north on the island of Madura.</p> 2022-05-13T14:54:39+00:00 ##submission.copyrightStatement## Data Classification and Access Control in Indonesia One Map Policy Geoportal 2022-05-24T06:09:45+00:00 Bayu Purwanto <p>Indonesia has a data access policy on one map policy geoportal. Users at each level of government have different access rights to data. The President has full rights to view and downloads the data, while the governor or regent can only see certain attributes and download only its region on the same data. Data in one map policy geoportal must be able to facilitate the differences in access rights. The one map policy geoportal uses a service query system to facilitate the classification of access to process view data. In the process of downloading data geoportal using database queries. The choice of download data through the database is based on the results of the test download data from the database and service. These results indicate that downloading data through the database is faster than downloading data through a service.</p> 2022-05-24T00:00:00+00:00 ##submission.copyrightStatement##