Detection of True Mangroves in Indonesia Using Satellite Remote Sensing

Abstract

Mangrove existence is necessary to protect the coastal. One method that can be used to keep mangrove existence were using satellite imagery monitoring. The number of bands in the imagery led to the selection for the RGB composite bands was difficult because of many combinations to try. One technique that can be done to get the best RGB combination of an object is to use Optimum Index Factor (OIF). OIF is a statistical technique for selecting three combinations of imagery bands to visualize the image display to the fullest. It is based on the value of total variance and the correlation coefficient between the bands. Landsat 8 has seven bands with 30 m resolution, one panchromatic band with 15 m resolution, and two bands with 100 m resolution. The purpose of this study was to detect true mangrove using three bands from OIF value of Landsat 8. The results of the processing from 6 bands (2-3-4-5-6-7) obtained 20 bands combinations with the highest value of OIF is 0,168, i.e., bands 2-5-6 (Blue, NIR, SWIR-1). Based on the combination, the next step was the unsupervised classification process for true mangrove identification (Rizhopora, Brugueira, Avicennia and Soneratia). The best classification using band combination 2-3-4-5-6-7 with true mangrove reached 4.041 ha.

A Proposal for Automatic Coastline Extraction from Landsat 8 OLI Images Combining Modified Optimum Index Factor (MOIF) and K-Means

“…In fact, this index uses the correlation coefficient to identify the possibility of duplication of information and entrusts the variance with the task of identifying the amount of information. Bands with lots of "information" (high standard deviation) and a little "duplication" (low correlation between bands) will produce high OIF values [63]. However, the standard deviation may not be sufficient to underline the usefulness of an image in differentiating land cover classes.…”

The Critical Level of Mangrove Ecosystem in Lariang Watershed Downstream, West Sulawesi-Indonesia

“…The second step was the mangrove area calculating, both those that were still vegetation and nonvegetation. Mangrove area data collection was done by photogrammetric [54,55] and terrestrial [56]. Photogrammetric method was conducted by the area calculating on a map / image Landsat 7 ETM + band 542.…”