Data

Characteristics

Source

Relevance

DEM

30 m

USGS

Delineate urban watershed (basin map) and generation of elevation data and slope.

High-resolution satellite images

Worldview-2 2016 (0.46 m) and IKONOS 2008 (1.4 m)

Digital Globe Foundation and Space Application and

Environmental Laboratory, Obafemi Awolowo University.

Dynamics in the type of LULC with object-based image analysis (OBIA)

Medium resolution satellite image

Landsat MSS, TM, ETM⁺ and OLI (path 190, 191 and row 55). 2008, 2016.

Global land cover Facility

(GLCF)

Derived Land Surface Parameters which are Land Surface Temperature, NDVI, Emissivity, and Brightness Temperature.

Impervious Surface Analysis

Tool (ISAT).

Hydrological unit, Land Cover Grid, Impervious Surface Coefficient and

Population data.

The National Oceanic and

Atmospheric Administration

(NOAA) Coastal Service Center.

Assess the correlation between the increase in impervious surface and decrease in water quality in small watersheds.

Location Data

Longitude and Latitude

GPS and UAV (Drone) of 10 cm

Assess more precise interpretations of the satellite imageries, Identify and validate significant areas and other features as well as the post classification points on the ground. Identify sampling points generated on the ISAT map