this code is now moving to https://gitlab.com/nibioopensource/resolve-overlap-and-gap

resolve-overlap-and-gap

The plan here is use Postgis Topology to resolve overlaps and gaps for a simple feature layer.

For the input

• It handles only geometry polygon
• It must be a single primary key
• If we have surfaces of simple feature and st_valid attributes on the surfaces will not be used.

This function now depend on

• dblink (this replaced code from https://www.gnu.org/software/parallel)
• Postgres 10 or higher
• https://github.com/larsop/postgres_execute_parallel
• https://github.com/larsop/content_balanced_grid

To checkout code

git clone --recursive https://github.com/larsop/resolve-overlap-and-gap.git

To test code

cd resolve-overlap-and-gap make check

To install code (must run make check first)

psql postgres -c "CREATE DATABASE aeg_02 template=template0;" psql aeg_02 -c "create extension pg_stat_statements; create extension postgis; create extension postgis_topology; create extension dblink;" psql aeg_02 -f ./src/test/sql/regress/resolve_overlap_and_gap-install.sql

The following is implemented

• Load all lines into Postgis Topology
• Smooth lines if requested
• Collapse small/tiny surfaces if requested
• Collapse small/tiny gaps if requested
• Create new a new simple Feature layer
• Add attributes and assign values