Simplify map tool - don't use douglas-peucker simplification

[qgib]

Author Name: Nyall Dawson (@nyalldawson)
Original Redmine Issue: 18083
Affected QGIS version: master
Redmine category:map_tools
Assignee: Denis Rouzaud

---

The simplify map tool currently forces Douglas-Peucker simplification (via the QgsGeometry::simplify method). Unfortunately this simplification technique is not ideal as it preserves jagged spikes within line work, making it unusable for cartographic simplification.

A better choice would be to utilise Visvalingam simplification (which is available from the QgsMapToPixelGeometrySimplifier class) - this simplification technique prefers to eliminate narrow jagged spikes, resulting in much more pleasing cartographic simplification.

(Or better - expose this choice to users so that they can select an appropriate simplification technique for their requirements)

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

---

Applied in changeset dce2188.

---

• done_ratio was changed from 0 to 100
• status_id was changed from Open to Closed

[qgib]

Author Name: Giovanni Manghi (@gioman)

---

• resolution was changed from to fixed/implemented