Remote sensing and GIS application for mapping data base of sustainable agriculture land in Denpasar City

Abstract

The Government of Indonesia has issued legislation in an effort to protect sustainable food agricultural land (SFAL), supplemented by Ministerial Regulation, which the aim is for national food security and sovereignty. The assessment accuracy of rice field data is depending on the spatial resolution and temporal variation. Geospatial based agricultural database inventory supports agricultural development programs. The research objective was to compile the SFAL data base (agricultural resources and ownership map). Research methods include analysis of high-resolution Word View 2018 satellite imagery, field surveys and thematic mapping. QGIS 3.6 software, SAS Planet and Locus GIS. Land resources inventory (paddy area in three subak 59.8 ha, Typic Tropaquepts, rainfall of 1,500 to 2,000 mm year−1, origin slope 3 to 8%, terraced, very suitable for lowland rice, suitable for horticulture). Human resources (82 people as owner, 88 farmers as cultivator), 70.95% of those have primary school education and 78.3% are aged 51 to 70 years old. Artificial resources (4,800 m tertiary irrigation channel, 2,470 m farm roads, 5 tractors), rice-rice-horticulture cropping pattern, produce 6.5 t ha−1 of rice. Map and information system of subak rice fields, land suitability and geospatial-based land tenure information as SFAL database can assist local governments in sustainable agricultural development.