2.3. Methodology:

We will create two new layers:

  1. a polygon layer with the areas of interest outlined

  2. a point layer with the locations of measurement ?oints

For this exercise we will use onscreen digitizing. We assume that the areas of interest will be those where we find discrepencies between wetland layers and are also close to existing residential development. We will overlay the orthophoto, and NWI and DEP wetlands datasets to “eye-ball” such areas and outline them. Then we will add point features for the location of measurements. Let’s think about the attributes for our new layers:

Layer Name

Layer type

Attributes/type/Description

StudyAreas.shp

polygon

mID (number) some ID

Name (string) name of area

Priority (string) priority to check

MeasurePoints.shp

point

pID (number) some ID

mDate (string) data of visit

mData (string) observations/measurements

Note: you need to design your layers as it’s difficult to change attributes properties later.