1. Salesforce Help Documentation
"Select Service Appointments on the Map": This document explicitly states
"To select multiple appointments in a certain area
draw a polygon around them on the map." This confirms the use of a polygon for geographical selection. (Salesforce Help
Field Service Guide
"Dispatcher Console Map and Gantt"
Section: "Select Service Appointments on the Map").
2. Salesforce Help Documentation
"Work with Service Appointments in Bulk from the Dispatcher Console": This guide details the process after selection: "After you select one or more service appointments in the appointment list or on the map
you can perform the same action on all of them... Available bulk actions include... Unschedule." This supports using a bulk 'Unschedule' action on the map-selected appointments. (Salesforce Help
Field Service Guide
"Schedule Service Appointments"
Section: "Work with Service Appointments in Bulk from the Dispatcher Console").