Next, the first phase of the photointerpretation
was carried out, consisting of the identification of the apical vertebra and the upper limit vertebra of the scoliotic curve.
Potential monitoring stations were first identified by generating a list of coordinates using the TPWD Coastal Fisheries sampling grid system (TPWD 2012a) and historic seagrass coverage available as geographic information system (GIS) polygon shapefiles derived from imagery photointerpretation
(Mark Fisher, TPWD, pers.
With the growing availability of high-resolution and large-scale imagery, a new way of research on computer-based photointerpretation
of trees was recently initiated .
Pre-photointerpretation fieldwork was conducted in the summer of 2010 to ensure accurate photointerpretation
. This preliminary field checking was focused on advanced signature identification prior to beginning digitization and was completed to identify and classify reef signatures appearing on the 2009 aerial photographs.
Nevertheless, when more precise knowledge of land use change is required from the point of view of urban land occupation at a regional scale, databases such as MLU aim to fill this vacuum by providing urban land use information only obtainable at scales of detail in excess of 1: 10,000 through exhaustive analysis based on photointerpretation
The other is the use of the 2D aerial images, photointerpretation
and appropriate vectorization.