tile-lod-and-overzoom SKILL.md skillA
tile-lod-and-overzoom from yuiseki/map-from-scratch is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yuiseki/map-from-scratch/tile-lod-and-overzoom@git:20261026.79a684ePins git:20261026.79a684e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yuiseki/map-from-scratch
- Path
.agents/skills/tile-lod-and-overzoom/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261026.79a684e, committed Oct 26, 2026
- Size
- 35,671 bytes
- Repository stars
- 24
- License
- GPL-3.0
How map engines choose which tiles and which zoom level to draw for a view (single zoom, per-tile LOD under pitch or on a globe, screen-space error, tile budgets), how they draw past the data's max zoom (overzoom), and what they show while tiles load (parent/child fallback, pruning). Load it when a map-from-scratch request has more data than one bake can ship, zooms past the data's detail, pitches the camera or uses a globe, or when writing `architecture_selection.not_doing` and deciding…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Tile LOD and overzoom: which level to draw, and what to draw when it is missing A tiled renderer answers three questions every frame. Which tiles cover the view, and at what zoom each? What to draw for a zoom deeper than the data goes? What to show for a tile that has not arrived yet? General engines answer all three for every camera (pitch to the horizon, globes, fractional zoom, slow networks), and most of their code, knobs and regressions in this area come from that generality. A renderer made for one request can often skip all three (the examples in this repo bake everything and list "tiles, LOD" under `not_doing`, see 05), or answer one of them with a single function. This skill collects what the engines in `ref-repos/` decided, what they measured, and what they reverted (decision records mined from 42 engines, 22 of which had something to say here), so the choice is made from evidence. Per-engine detail (exact constants, the order of fixes, review discussions) is in [references/engines.md](references/engines.md). Numbers in brackets refer to the Sources list at the end. ## First decision: do you need tiles or LOD at all? …
Read the whole file at its exact version.
How to install
mdr add yuiseki/map-from-scratch/tile-lod-and-overzoom@sha256:1294feab0fe13d42The line at the top of this page pins the label git:20261026.79a684e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_z5c2lktzh5aiu6w6)
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Versions
The registry has recorded 1 version of this file, committed on Oct 26, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (35671 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
yuiseki/map-from-scratch · 24 stars · license GPL-3.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_z5c2lktzh5aiu6w6 GET https://markdownregistry.com/api/v1/resolve?ref=yuiseki/map-from-scratch/tile-lod-and-overzoom GET https://markdownregistry.com/api/v1/blob/1294feab0fe13d420aee788ab864c75ce2d0a84927ef322855575a99569d0698
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.