Journal of Applied Geospatial Information <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> Politeknik Negeri Batam en-US Journal of Applied Geospatial Information 2579-3608 <p>Copyright @2020. This is an open-access article distributed under the terms of the Creative Commons&nbsp;Attribution-ShareAlike 4.0 International License which permits unrestricted use, distribution, and reproduction in any medium.&nbsp;Copyrights of all materials published in&nbsp;JAGI are freely available without charge to users or / institution. Users are allowed to read, download, copy, distribute, search, or link to&nbsp;full-text&nbsp;articles in this journal without asking&nbsp;by giving&nbsp;appropriate credit, provide a link to the license, and&nbsp;indicate if changes were made. All of the&nbsp;remix, transform, or build upon the material must distribute the contributions under the&nbsp;same license&nbsp;as the original.&nbsp;</p> Development And Field Test Of Gps-Gsm Drifting Buoy For Measurement Of Sea Surface Current Data <p>Spatial data of coastal currents are generally obtained from altimetry satellites. However, the data obtained still has shortcomings, such as the low level of resolution and the need for field validation (ground truth). The electronic drifting buoy (GPS-GSM) is an oceanographic data acquisition instrument that uses a cyber-physical system (SSF) and follows the movement of water around the instrument. The application of the SSF system will facilitate data acquisition from the drifting buoy because the data will be directly entered into the database, transmitted through the GSM system, and monitored in real-time. The design of the ESP32 microcontroller-based instrument is supported by a GPS module for location data acquisition and a GSM module for data transmission to the database. The drifting buoy has dimensions of 52 cm high and 30 cm wide, while the current trap section has dimensions of 26 cm high and 15 cm wide for each wing made of iron. The field test was conducted in the Seribu Islands, DKI Jakarta province, with the current velocity ranged from 0.03 m/s to 0.35 m/s and the average current velocity was 0.19 m/s, while the surface temperature ranged from 26.37 to 27.83 °C with an average value of 26.75 °C.</p> Agung Tri Nugroho Indra Jaya Yuli Naulita ##submission.copyrightStatement## 2022-07-28 2022-07-28 6 2 607 614 10.30871/jagi.v6i2.4228 Monitoring of Land Surface Change in Padang City Using Dinsar Sentinel-1a Method <p>Padang City is the capital city of West Sumatra Province which is located on the west coast of the island of Sumatra which is generally associated with tectonic earthquakes. This condition causes the city of Padang to become a disaster-prone area, one of which is land surface changes. The earthquake that occurred caused shocks to the rock and soil layers, causing water below the earth's surface to come out and resulting in changes to the soil surface. Besides, changes in soil surface are also caused by several things, including excessive groundwater extraction and soil type factors. To reduce the bad impacts, it is necessary to monitor the ground surface and to reduce the risk of a disaster. In a broad scope, the use of SAR imagery using the DinSAR method can monitor changes in the land surface in the city of Padang. The data used were Sentinel -1A imagery based on 3 earthquakes with a strength of more than 5 magnitudes centered on the Mentawai Islands, on September 8, 19, and 21 October 2020. From this research, the results obtained from the earthquake 8 September 2020 with satellite recording data 28 August (slave) and September 9, 2020 (master), there was land subsidence with a range of 0 - 25 mm along the coast of Padang City. The 19 and 21 October 2020 earthquakes with satellite recording data of 27 October 2020 (slave) and 15 October 2020 (master) obtained almost even surface subsidence with a range of 0 - 40 mm throughout the residential area of ​​Padang City.</p> Desi Syafriani Saiyidinal Fikri Quinoza Guvil ##submission.copyrightStatement## 2022-08-01 2022-08-01 6 2 615 619 10.30871/jagi.v6i2.4134 Analysis of Land Cover Changes On Rainwater Runoff In Ciapus Sub-Watershed <p>Ciapus Sub Watershed is part of the Cisadane watershed which passes through 3 (three) sub-districts in Bogor Regency, namely Dramaga District, Ciomas District, and Tamansari District. From 2011 to 2020 housing construction in Dramaga, Ciomas and Tamansari sub-districts increased. High enough rainfall and continuous land changes will result in water infiltration not functioning properly and will cause an increase in surface runoff. Therefore, it is necessary to know how much influence changes in land cover have on the runoff discharge of rainwater in the Ciapus sub-watershed. The purpose of this study was to identify changes in land cover in the Ciapus sub-watershed and to determine the magnitude of the increase in runoff due to changes in land cover in the Ciapus sub-watershed. The results of the analysis of the Ciapus sub-watershed have 8 types of land cover, namely water bodies, primary dry land forest, secondary dry land forest, gardens, dry land agriculture, mixed dry land agriculture, rice fields and settlements. The biggest change in land cover area between 2011 and 2020 is the increase in residential area of ​​2441.59 ha. Meanwhile, dry land agriculture experienced the largest reduction in area of ​​1288.68 ha. Based on the calculation of runoff discharge using the rational method, the amount of discharge that occurred in 2011 was 153.31 mm/second while in 2020 it was 214.99 mm/second</p> Alimuddin Alimuddin Feril Hariati Fachruddin Fachruddin Muhamad Lutfi Muhamad Rizki ##submission.copyrightStatement## 2022-08-15 2022-08-15 6 2 620 625 10.30871/jagi.v6i2.4188 TSS Analysis (Total Suspended Soil) Using GEE (Google Earth Engine) Cloud Technology in Belawan Waters <p>The TSS research using GEE Cloud Technology in Belawan Waters was carried out from January to May 2021. The analysis was carried out using the Sentinel-2 Satellite. TSS results obtained that the amount is 0,011010879-53,74369064 mg/liter. The content of TSS is spread evenly around the outskirts of Belawan Waters to the Middle of Belawan Waters and has passed the quality standard limit according to the Minister of Environment of Republic Indonesia that means the Harbour area is polluted and improper for drinking water as well as for fish cultivation.</p> Mardame Pangihutan Sinaga Jono Barita Sianipar Ady Frenly Simanullang Goldberd Harmuda Duva Sinaga Ewin Handoco S Welmar Olfan Basten Barat ##submission.copyrightStatement## 2022-08-16 2022-08-16 6 2 626 631 10.30871/jagi.v6i2.4317 Design and Build a Pharmacy Location Mapping Information System in Batam City <p>Geographic information systems have been widely applied in the health sector, including to determine the location of medical clinics, midwife clinics, and pharmacies. Currently, in Batam City, there is no mapping-based system that is used to find out the distribution of pharmacy locations, so it is very difficult for the public to get information on the location of pharmacies that are close to their location. Therefore, in this study, an information system for mapping the location of pharmacies in Batam City was made by adopting GIS technology. The study used a descriptive analysis approach and was developed using the waterfall method in software development and UML as a design tool. The system produced in this study is proven to be able to provide pharmacy location information and assist admins in managing pharmacy location data.</p> Fendi Hidayat Dwi Ratna Fitriyani Fifin Oktaviani Yoga Fitriana ##submission.copyrightStatement## 2022-08-22 2022-08-22 6 2 632 637 10.30871/jagi.v6i2.4394 The Effect of Water Quality on Growth of Microalgaes Chlorella pyrenoidosa <p>The diversity of microalgae on earth is very high, the high diversity of microalgae allows us to obtain microalgae that have the potential to produce large amounts of oil. In addition, the use of microalgae as a source of biodiesel does not interfere with the food supply. This is because microalgae do not compete with food. The results of the analysis showed that the parameters that passed the water quality standard were BOD in the range of 0.990-90.76 mg/l, COD in the range of 3.093 -283 mg/l, and phosphate in the range of 0.01-0.21 mg/l. Judging from the color and smell, the waters that are closer to the cages will be greener in color accompanied by the smell of fish mixed with fishy feed and feel thick. COD content ranged from 3.093 mg/l-269.5 mg/l. This is caused by the high concentration of organic matter in the waters. The quality of the waters of Lake Toba which is classified as not good is the measurement of color, smell, taste, BOD, COD, and Phosphate in the waters. Which are classified as good temperature, turbidity, pH, Ammonia, and Nitrate. The level of fertility of the waters of Lake Toba in terms of the abundance of phytoplankton is included in the fertile category. If it is categorized at the level of pollution through the diversity index, then the waters are included in the moderately polluted category.</p> Srinatalia Silaen Welmar Olfan Basten Barat ##submission.copyrightStatement## 2022-08-22 2022-08-22 6 2 638 640 10.30871/jagi.v6i2.4396 Geographic Information System (GIS) as an Information Media in the Field of Environmental Health: Literature Review <p>Geographic Information System (GIS) is a system with a collection of data that has a special capacity to combine data, coordinate data, and perform data checks that produce output to be used as a source of decision making. Geographic Information Systems (GIS) can be linked to health information at a particular location, combine, analyze and produce the health information according to activities in the health sector per location. Furthermore, the use of Geographic Information Systems (GIS) is planned to determine areas, conditions, styles, patterns and models related to the health sector. Geographic Information System (GIS) can create a map display by knowing the data from the map and other related data in presenting information about an area on the map.</p> Maghfirah Dara Chaniago Herika Muhamad Taki ##submission.copyrightStatement## 2022-08-22 2022-08-22 6 2 641 646 10.30871/jagi.v6i2.4319 Study of Flood Vulnerability in Pesanggrahan District, South Jakarta <p>Pesanggrahan Sub-district is located in South Jakarta Administrative City, DKI Jakarta Province, Pesanggrahan Sub-district is crossed by Pesanggrahan River which divides sub-districts and crosses several villages that are included in Pesanggrahan District. In the rainy season, floods often occur due to overflowing water in this Pesanggrahan river and resulting in material and non-material losses. The purpose of this study is to determine the level of flood vulnerability that has occurred, especially in areas that have not been affected in order to avoid the risks that occur. The benefit of this research is to input mitigation efforts that will be carried out in the event of a flood. The research variables used in this study are the area of ​​the flood range from the river, elevation, slope and land use. The research method is using GIS technique to superimpose or map overlay, scoring, and weight using Geographic Information System (GIS) software. The expected result is the creation of a classification of the level of flood vulnerability and its extent. The planned mitigation directives are directives related to river body improvement, utilization of river commensurate space intended for the government, and the community. This research is one of the personal research roadmaps and is in accordance with the faculty research roadmap. This research is included in the building and environmental disaster mitigation research cluster, the leading field of green urban environment and the national research master plan on disaster management. The planned output is scientific work published in reputable international journals and Intellectual Property Rights.</p> Herika Muhamad Taki Anita Sitawati Wartaman ##submission.copyrightStatement## 2022-09-05 2022-09-05 6 2 647 651 10.30871/jagi.v6i2.4308