TY  - JOUR 
A1  - Viaña Borja, Sandra Paola
AU  - Ortega Sánchez, Miguel
T1  - Automatic Methodology to Detect the Coastline from Landsat Images with a New Water Index Assessed on Three Different Spanish Mediterranean Deltas
Y1  - 2019
UR  - http://hdl.handle.net/10481/57612
AB  - Due to the importance of coastline detection in coastal studies, different methods have
been developed in recent decades in accordance with the evolution of measuring techniques such
as remote sensing. This work proposes an automatic methodology with new water indexes to
detect the coastline from different multispectral Landsat images; the methodology is applied to three
Spanish deltas in the Mediterranean Sea. The new water indexes use surface reflectance rather than
top-of-atmosphere reflectance from blue and shortwave infrared (SWIR 2) Landsat bands. A total
of 621 sets of images were analyzed from three different Landsat sensors with a moderate spatial
resolution of 30 m. Our proposal, which was compared to the most commonly used water indexes,
showed outstanding performance in automatic detection of the coastline in 96% of the data analyzed,
which also reached the minimum value of bias of -0.91 m and a standard deviation ranging from
+/-4.7 and +/-7.29min some cases in contrast to the existing values. Bicubic interpolation was evaluated
for a simple sub-pixel analysis to assess its capability in improving the accuracy of coastline extraction.
Our methodology represents a step forward in automatic coastline detection that can be applied to
micro-tidal coastal sites with different land covers using many multi-sensor satellite images.
KW  - Remote sensing
KW  - Water index
KW  - Coastline mapping
KW  - Landsat images
LA  - eng
PB  - MDPI
ER  -