Compare location options when the team flags them
Use one agreed reaction to turn a location shortlist into a travel comparison when it is ready.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Calculate Matrix
Tool to calculate distance, time, or weight matrices via POST. Use when you have multiple origins/destinations or a symmetric point set and need a single batch request.
Why this helps
Location options sit idle when nobody knows whether they are ready for a detailed comparison.
- Make an agreed reaction a lightweight planning signal.
- Run one matrix for multiple locations rather than comparing each pair manually.
- Keep detailed calculations focused on messages the team flags.
Setup
Build it in a few focused steps.
- 1Connect Slack and GraphHopper to Notis once in the portal.
- 2Create an automation in the portal or ask Notis to prepare one.
- 3In one instruction, tell Notis to calculate the requested time or distance matrix when a specified reaction is added to a message containing location options.
- 4Pick the Slack message reaction added trigger and choose the run-report channel.
- 5Test by reacting to a real message with a small location shortlist.
Questions about this workflow
Can I choose which reaction should start it?
The reaction trigger supports optional emoji filtering; specify the agreed planning reaction when setting up the trigger.
What must the reacted-to message contain?
It should include the origins and destination options needed for the comparison, or a clear reference Notis can interpret.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Graphhopper. A trigger fires from one place; an action lands in another.
Slack triggers
Graphhopper actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Capacity Clustering
Tool to solve capacity clustering problem. Use when assigning a set of customers to clusters to minimize total distance synchronously.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
GraphHopper Geocoding
Tool to perform forward or reverse geocoding. Use when converting between textual addresses and latitude/longitude coordinates.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Get Isochrone
Tool to compute isochrone polygons for a given point. Use when you need to determine areas reachable within time or distance constraints.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Calculate Matrix
Tool to calculate distance, time, or weight matrices via POST. Use when you have multiple origins/destinations or a symmetric point set and need a single batch request.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Get Custom Profiles
Tool to retrieve a list of all user-defined routing profiles. Use when you need to list custom profiles.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
POST Route
Tool to calculate complex routes via POST /route. Use when you need advanced route planning with custom parameters.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Upload GPX File
Tool to upload a GPX file to a public file hosting endpoint. Returns a public URL which can be used where a 's3key' is required.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
GraphHopper VRP POST
Tool to initiate VRP optimization. Use when you need to solve vehicle routing problems synchronously.
Connect any two apps with Notis in the middle.
Slack and Graphhopper, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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