# Surface Grid Walk

> Walk the dimension-by-lens grid across the catalog, mark every cell that carries a surface, and surface the empty cells as candidate gaps using the anomaly lens, so a missing aspect is detected structurally rather than by recollection.

Record: `algorithms:surface-grid-walk`
Kind: algorithm
Canonical: https://banes-lab.com/ontology/algorithms#algorithms-surface-grid-walk
Closure: https://banes-lab.com/json/records/algorithms/surface-grid-walk/closure

Listed in [Algorithm contracts](https://banes-lab.com/api/records/algorithms.md), after [Coverage Workspace](https://banes-lab.com/records/algorithms/coverage-workspace.md) and before [Uncovered Gap Derivation](https://banes-lab.com/records/algorithms/uncovered-gap-derivation.md).

## Domain

- [Test coverage](https://banes-lab.com/records/algorithms-domain/test-coverage.md)

## Stage

- [see](https://banes-lab.com/records/stage/see.md)

## Axis

- [analysis](https://banes-lab.com/records/reasoning/axis-analysis.md)

## Tier

- [process](https://banes-lab.com/records/vocabulary/domain-tier-process.md)

## Composed by

- [Test Coverage Kernel](https://banes-lab.com/records/algorithms/test-coverage-kernel.md)

## Grounds

- [anomaly](https://banes-lab.com/records/reasoning/lens-anomaly.md)
- [semantic-correctness](https://banes-lab.com/records/reasoning/test-surface-semantic-correctness.md)

## Named in the derivation of

- [Test Coverage Kernel](https://banes-lab.com/records/algorithms/test-coverage-kernel.md)

## Math type

- [Set Theory](https://banes-lab.com/records/reasoning/math-type-set-theory.md)

## Force

- [Correctness verification](https://banes-lab.com/records/force/correctness-verification.md)
- [Semantic consistency](https://banes-lab.com/records/force/semantic-consistency.md)

## Linked from

- [A cell that resists an invariant](https://banes-lab.com/software-architecture/coverage/a-cell-that-resists-an-invariant.md)
- [Test coverage](https://banes-lab.com/ontology/algorithms/algorithms-domain-test-coverage.md)
- [The derivation loop](https://banes-lab.com/ontology/reasoning/reasoning-loop-derivation-loop.md)
- [The axes](https://banes-lab.com/ontology/reasoning/the-axes.md)
- [The mathematics](https://banes-lab.com/ontology/reasoning/the-mathematics.md)
- [Domain tiers](https://banes-lab.com/ontology/schema/the-vocabulary-domain-tier.md)
- [The forces](https://banes-lab.com/ontology/schema/the-forces.md)