Dozer Country v0.8

Features in full

You pick what you are working with FIRST -- nothing is painted until you do -- and the bands are that machine's slope limits from the per-machine table in USFS/NWCG S-236 Heavy Equipment Boss, Student Workbook (June 2013, NFES 002690), Unit 2. A dozer is the most capable machine in that table and everything else is held tighter. For a dozer: dozers should not be operated across slopes (sidehill) over 45 percent, uphill over 55 percent, or downhill over 75 percent.

• 0-45% within all three limits
• 46-55% over the sidehill limit; up and down only, not across
• 56-75% over the uphill limit; downhill only, at the last limit
• over 75% over every limit in the guide

Capabilities

• Draw an area of interest with ATAK's own polygon tool and get the slope inside it classed against the standard. The color stops at the ring you drew, not at a box around it.
• Exceptions only: ground inside every limit is left unshaded so the basemap shows through, because an overlay should not spend the screen saying "fine".
• Each cell is classed by the WORST slope within one chain (66 ft), not by its own value, so an isolated flat spot inside a steep face is not called workable.
• Slope is computed from the elevation already on the device. The plugin downloads nothing and reaches no network at all.
• It refuses rather than guesses. Without DTED2 (30 m posts) or better over every part of the area it declines, and says what it found and what to load.
• Water is left unclassed rather than painted as workable ground.
• The standard ships as a readable JSON asset, not as constants, so the numbers a color is claiming can be audited by the person whose ground it is.
• An on-screen legend using ATAK's own gradient widget, and a panel that states the cell size, the window actually used, and anything it could not class.

Limitations, stated on screen as well as here: this is slope steepness only, read as worst case. It does not know the direction a line will run, nor soil, rock, moisture or fuel. The 45% boundary is the cross-slope limit, so unshaded ground is under every limit whichever way the machine sits; ground shown at 46-55% may still be workable straight up and down. It is a guideline from the guide, not a clearance.

Equipment required

An Android device running ATAK-CIV 5.6, 5.7 or 5.8, with DTED Level 2 (30 m) or better elevation loaded for the ground of interest. Elevation can be loaded through ATAK's own elevation manager or with the Map Depot plugin.

Without DTED2 the plugin does not draw; it says so and names what to load.

Works with

Any ATAK-capable Android device. No external hardware, no sensors, no radios.

Tested on a Samsung Galaxy XCover Pro running ATAK-CIV 5.8.0.3.

Network and security

None. The plugin makes no network connections of any kind. It reads the elevation already present on the device through ATAK's own elevation API and writes nothing outside its own APK assets. It publishes no CoT and contacts no server.

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