Thanet terrain study3D existing / proposed comparison
NAVD88 · feet Open 2D evidence map

One site · two terrain records

Read the grade change in three dimensions.

Compare official 2015 bare-earth terrain with the supported portion of the April 2026 grading proposal. Rotate the landform, reveal one surface over the other, then inspect the shared edge with Governors Lane.

Interactive terrain room

29 Thanet Circle

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Proposed minus existing LoweringLittle changeRaising feet of vertical change · only where both surfaces are supported

Guided reading

010203

Start with the landform

Follow a three-step view of the existing ridge, supported proposed grading, and Governors Lane edge.

Shared-edge evidence

Four plan-derived grade differences

3.94 ft5.66 ft6.06 ft6.28 ft

High-side minus low-side plan grades. These are not measured wall heights.

Read before interpreting

What the model can and cannot show

Evidence register

Sources & method

Existing surface
USGS 3DEP, 1-meter bare-earth DEM, acquired April 6, 2015; NAVD88 feet after conversion. Built September 1, 2026. USGS response SHA-256:
a878d82cfc5c41864b583700b2bc49e64dacb177576973e71e29c512b3cc1f28
Proposed surface
Reconstructed from 25 accepted controls on the April 24, 2026 grading plan; unsupported cells excluded. Built September 1, 2026. Source-plan PDF SHA-256:
c5a416ae2d5161968222e00437add4c6095880ec292f0465e8527eed67a9d990
Comparison
Proposed minus existing on one exact 202 × 319 grid. Values are explanatory, not construction quantities.