SCHEME O is a planning and mapping tool built for military members who need to create, control, and trust geometries on a map.
Geometries are the core of the product — not an add-on.
Create scenarios and apply precise geometries to understand space, distance, and constraints before decisions are made.
SCHEME O focuses on:
What you draw is what you get.
Start building geometries.
Effective Date: February 15, 2026
SchemeO Holdings LLC ("we", "us", or "our") operates the SCHEME O web application. We are committed to protecting your privacy. This policy explains how we collect, use, and safeguard your information.
We use your data to:
We do not sell your personal information. We may share data with trusted third-party service providers (such as hosting, authentication, and analytics providers) solely to operate the service. We may also disclose information if required by law.
We retain your account data as long as your account is active. You may request deletion of your account and associated data by contacting us at privacy@schemeo.org.
We implement reasonable security measures to protect your data. However, no method of transmission over the Internet is 100% secure, and we cannot guarantee absolute security.
Our service is not intended for individuals under the age of 18. We do not knowingly collect personal data from minors.
If you have questions about this policy, please contact us at privacy@schemeo.org.
Effective Date: February 15, 2026
Welcome to SCHEME O. By accessing or using our website and services, you agree to be bound by these Terms of Use. If you do not agree, please do not use the service.
WARNING: SCHEME O is a planning aid and educational tool only. It is NOT a certified fire control system or a substitute for official tactical decision-making aids.
You agree that you will not rely on SCHEME O for real-world combat operations, live-fire range safety, or any situation where failure could result in injury or death. You assume all risks associated with the use of this tool.
SCHEME O is an independent product of SchemeO Holdings LLC. It is not affiliated with, endorsed by, or sponsored by the U.S. Department of Defense or any military branch.
The service is provided "AS IS" and "AS AVAILABLE" without any warranties of any kind, express or implied. We do not guarantee that the service will be error-free, accurate, or uninterrupted.
To the maximum extent permitted by law, SchemeO Holdings LLC shall not be liable for any indirect, incidental, special, or consequential damages arising out of or in connection with your use of the service. You specifically waive any right to sue for damages resulting from reliance on this tool in real-world operations.
We reserve the right to suspend or terminate your access to the service at any time, for any reason, including violation of these Terms.
These Terms are governed by the laws of the State of California, without regard to its conflict of law principles.
For legal inquiries, please contact us at legal@schemeo.org.
Scenarios: A saved "state" of all markers, lines, and settings. These live in your browser's local storage.
Geometries: Visual planning aids (SDZs, Fans, range rings) derived from standard doctrinal distances.
Delete or Backspace.📍 FRD / 🎯 ENY: Place units. Friendlies generate fans; Enemies are targets.
🔗 Generate GTLs: Creates a Gun Target Line. 1. Click Friendly (Shooter) 2. Click Enemy (Target).
✏️ Line: Draws tactical graphics. Click start point, then click end point to create.
📏 Measure: Click start, click end. Shows distance, grid/mag azimuth, and elevation delta.
👣 Route: Plots a path. Calculates total distance and travel time based on the "Pace" setting.
👁️ View (Viewshed): Generates a terrain visibility map (green = visible). Accounts for earth curvature.
Icons update automatically based on type. Use the Config Panel to adjust echelons.
Tip: Use "TCM" for Objectives, CCPs, LZs, and generic terrain labels.
Geometries represent surface danger zones or engagement areas.
Config: Use the "Safety Mode" dropdown (e.g., Tripod vs Bipod) to change the fan shape.
Create specific geometry shapes when standard templates don't fit.
*Useful for non-standard SDZs, range fans with specific lateral limits, or planning constraints.
Uses Mapbox Terrain-RGB data to calculate line-of-sight.
Create/Save: Type a name and click "Save Current View". Auto-saves to cloud (or local if offline).
Rename: Click the ✏️ Pencil icon in the saved list.
Delete: Click the 🗑 Trash icon.
Backups: Use DOWNLOAD DATA to save a `.json` file. Clearing browser cache deletes local saves!
Planning Aid Only: This tool is for training and preliminary planning. It does not replace certified firing solutions or authoritative tactical systems.
User Responsibility: Validate all coordinates, elevations, and safety limits against official sources (Map, LRF) before execution.
| SIDE | UNIT LABEL | GRID (MGRS) | SYMBOL | TYPE / ECHELON | WEAPON SYSTEM |
|---|
Height above ground level (Default: 5.5ft)
SCHEME O helps you quickly build, visualize, and save map-based scenarios, with a strong focus on building and working with geometries.
You can use SCHEME O to:
Get started:
The tutorial walks through the core workflow and shows how to build geometries, plan routes, and use the data matrix effectively.
| LABEL | TGT | SYS | RNG | AZ | VIS | EDT | DEL |
|---|
| UNIT | TYPE | GRID (MGRS 10) | ELEV | EDT | DEL |
|---|
| NAME | PACE | DIST (M) | TIME | PTS | DEL |
|---|
| ID / NAME | VERTICES | AREA (KM²) | DEL |
|---|
| ID | GRID (OBSERVER) | OBS HEIGHT | AREA (KM²) | DEL |
|---|
| NAME | TARGET | FAH (°) | INBOUND L | INBOUND R | OUTBOUND L | OUTBOUND R | VIS | EDT | DEL |
|---|