Rollup ECODISTRICT Components

Overview

This form will creates an ARC/INFO AML that will summarize ecodistrict components to higher levels in the national ecological framework (i.e. ecoregions, ecoprovinces, or ecozones.)

Background

Components in an EcoDistrict Component Table are defined as a percentage of the land area of the polygon. In order to summarize these attributes at the ecodistrict, ecoregion, or ecozone level, the percentage occurrence must be prorated by the land area of the respective polygons.

Since the EcoDistrict databases are a generalized product, the summaries produced by this program are also generalized. After the summary is created, percentages of less than 1 are dropped, and the percentages of the remaining components are recalculated to total 100%.

Create the AML

EcoDistrict component table name
Field to be summarized
rollup level	ECOREGION ECOPROVINCE ECOZONE

Source: Peter Schut
Contact: Head, CanSIS