Add a tunnel inventory recipe - #901
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The tutorial shows the model and the verbs; this shows a whole deployment. Three instrumented boreholes, a helically wound trench, and a buried coil, recorded through two interrogators, written the way a field crew would keep it -- small yaml files for the hardware and csv tables for the tracks -- and then loaded, attached, selected on, and enriched. The tables are the point. Every track in the authoring format is a spreadsheet, so the page writes the csv and renders it back, rather than reciting twenty-three constructor calls a reader would skip. It also does the two things nothing else documents end to end: the geometry track holding the wind angle so no consumer downstream has to know about it, and a repair recorded as a path epoch, with a straddling patch subdivided at the moment the contractor put a bucket through the trench cable.
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📝 WalkthroughWalkthroughThe PR adds a Quarto recipe for a DAS/DSS tunnel inventory. The recipe defines resources, optical paths, geometry, coupling, annotations, acquisition metadata, patch enrichment, repair epochs, serialization, and inventory discovery. The Recipes navigation links to the new recipe. ChangesTunnel inventory recipe
Possibly related PRs
Merge Risk: 🔵 Low · up to The new tunnel inventory recipe documents repaired paths, but the current example leaves the repair-cord interval without coupling and section metadata, which can produce incomplete enriched results for that segment; the PR is otherwise mergeable with explicit owner follow-up to correct the example. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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In `@docs/recipes/tunnel_inventory.qmd`:
- Line 407: Update docs/recipes/tunnel_inventory.qmd lines 407-407 to replace
the blanket endpoint substitution with explicit repaired section intervals,
extending the coil annotation through 439.7 m; update lines 426-431 to split
coupling intervals around the repair and add the patch-cord interval with its
actual coupling and annotation values, rather than classifying it as
trench/soil/direct_burial. Add assertions covering a post-repair coil channel
near 438 m and a channel within the repair interval.
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| #| code-summary: "path.00@2024-09-01 — the same path, after the repair" | ||
| epoch = "fiber_arrays/XT.TUN1/path.00@2024-09-01" | ||
| write(f"{epoch}/attrs.yaml", "object_type: OpticalPath\n") | ||
| write(f"{epoch}/annotations.csv", annotations_csv.replace("427.7", "429.7")) |
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Extend the repaired coil annotation to its new endpoint
When the repair epoch is created, this replacement moves the coil annotation's start from 427.7 to 429.7 but leaves its end at 437.7. The repaired component and coupling tracks place the ten-meter coil at 429.7–439.7, so enriching repaired data leaves the final two meters without section="coil", and select(section="coil") silently drops those channels.
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| coupling_csv.replace("370.0,427.7", "370.0,429.7").replace( | ||
| "427.7,437.7", "429.7,439.7" | ||
| ), |
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Keep the repair slack out of the trench coupling interval
For the repaired epoch, expanding the original trench interval to 370.0–429.7 also covers the 395.0–397.0 patch cord. The recipe states that this cord is coiled in the splice box, but enrichment and selection will report it as directly buried in soil at 0.5 m depth; split the trench coupling around the repair and describe or leave undefined the slack interval separately.
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| "name: helically wound trench cable\n" | ||
| "manufacturer: Silixa\n" | ||
| "model: HWC 30 degree\n" | ||
| "fiber_count: 1\n" |
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Provide separate fibers for the DAS and DSS paths
The trench cable is declared to contain only one fiber, but both path.00 and path.01 use it while the recipe explicitly describes the DSS as being on its own, different fiber. Readers copying this inventory therefore get a physical asset model that cannot represent the stated simultaneous DAS and DSS deployment; the cable needs at least two fibers with distinct fiber_number values, or the paths need separate cable resources.
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| borehole 3 down,305.0,60.0,0.0,-40.0 | ||
| borehole 3 up,305.0,60.0,0.0,-40.0 | ||
| borehole 3 up,345.0,60.0,0.0,0.0 | ||
| trench,370.0,0.0,0.0,-0.5 |
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Place the trench within reach of its connecting fiber
The third borehole head is placed at (60, 0, 0), but after only a 5 m pigtail and a 20 m connecting component the trench begins at (0, 0, -0.5). Even the straight-line separation is about 60 m, so this geometry cannot describe the continuous optical path in the component table and assigns the trench channels to the wrong part of the site; the trench should start near the reachable continuation of the borehole sequence, or the connecting component must reflect the actual route length.
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| write( | ||
| "fiber_arrays/XT.TUN1/path.01/coupling.csv", | ||
| "start_distance,end_distance,coupling_type,medium,attachment,depth\n" | ||
| "40.0,97.7,trench,soil,direct_burial,0.5\n", | ||
| ) |
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Add geometry for the DSS optical path
Because geometry is stored per OpticalPath, creating path.01 with only components and coupling does not inherit the surveyed trench coordinates from path.00. DSS patches enriched through XT.TUN1.01.DSS therefore receive no x, y, or z coordinates even though the recipe says this fiber occupies the same trench; write a path.01/geometry.csv with its own 40.0–97.7 distance range.
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| style="font-size:16px;line-height:1.25;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;white-space:pre;shape-inside:url(#rect14);display:inline"><tspan | ||
| x="47.923828" | ||
| y="-16.229106" | ||
| id="tspan40">1500 m</tspan></text> |
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Align the deployment diagram with the worked inventory
The SVG presented as this deployment's map/profile includes a visible 1500 m dimension and repeated 25 m spans, while the recipe defines a 40 m lead-in, 20 m borehole spacing, and no 1500 m component anywhere. Readers cannot reconcile the field notes and generated tables with the diagram, so the imported proposal figure should be updated or replaced with one using the recipe's dimensions.
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| " instrument_distance: [0.0, 437.7]\n" | ||
| " distance: [0.0, 437.7]\n", |
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Extend the DAS distance map after the repair
The repair lengthens path.00 to 439.7 m, but this acquisition remains bounded at instrument/path distance 437.7. DistanceMap.map_to_distance returns NaN outside its control-point range, so post-repair channels at instrument distances 438 and 439 cannot be placed on the newly added tail of the path and receive none of its geometry, coupling, or annotations even if those tracks are corrected; add a matching acquisition epoch with a 439.7 endpoint or use an identity map whose domain covers both path epochs.
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Codex noticed that the figures and the page described different tunnels. The drawing is not an illustration: it is a survey, with lettered waypoints, a 1500 m telemetry lead-in, fifteen-meter links between every feature, and coordinates on the tunnel's own grid. The page had a smaller deployment invented to keep the numbers round. The drawing wins. Every distance now comes from it, the winding factor is the 0.886 its coordinates are computed with, and the survey points are the ones it letters. The second interrogator is gone with them -- the drawing shows one fiber route, and a DSS path nobody surveyed would have been the same fiction in a different place. Three of its other findings come with it: the distance map ran out before the repaired path did, so the last two channels of the longer epoch resolved to nothing; the repair's patch cord was described as buried trench fiber when the point of it is that it is coiled in a splice box with no position at all; and "25 m in" meant optical meters while reading as trench meters. The tracks are now derived from the components table rather than typed against it, which is what makes the repair a five-row edit instead of forty hand-shifted distances.
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✅ Documentation built: |
A resource_id names an asset, not a kind, and the page had one splice box standing for the boxes at A and E, one turnaround housing standing for three holes down three separate boreholes, and the repair's patch cord declared as a length of the cable it was spliced into. Anyone adding a serial number or a maintenance record to one of those would have been describing all of them. The links between features also belong to the connecting cable the drawing distinguishes from the telemetry run, not to the run itself. Four more of Codex's findings: the break is fifteen meters into the trench rather than past box A, which is two and a half meters of drop away; the example patch had five channels past the end of the fiber; `.inventory.json` holds what model_dump_json writes rather than what to_yaml does; and a link's first channel does get a position, since it is the surveyed point the run before it ended on.
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All eight inline comments were written against The diagram against the inventory. Taken, and it was the important one. The drawing is not an illustration: it is a survey, with lettered waypoints, a 1500 m telemetry lead-in, 15 m links between every feature, and coordinates on the tunnel's own grid. Every distance in the page now comes from it, and the winding factor is the 0.886 its coordinates are computed with rather than the 0.866 the old prose claimed. The coil annotation, and the repair slack in the trench coupling. Both gone by construction. The three interval tracks are now generated from the components table's running totals rather than written against it, so a component whose distance moves takes its coupling and its annotation with it. The patch cord is excluded from the trench parts, and channel 1518 — inside the repair — now comes out with no The distance map bounded before the repaired path. Taken. The map now runs to 2000 m, past both epochs, and the page says why: a map that stops where today's fiber does stops working the day the fiber gets longer. The trench out of reach of borehole 3. Resolved by the survey. The trench is between boxes A and E, and the boreholes are worked back along the tunnel afterwards, which is the order the drawing shows; there is no longer a 60 m jump between consecutive components. Both DSS findings — the single-fiber trench cable, and |
Description
The inventory tutorial shows the model and the verbs. This is the worked example: one deployment, from field notes to enriched patches.
The deployment is an underground tunnel — a 1500 m telemetry run in from an instrument room, a helically wound cable trenched along the floor past a buried coil, and three instrumented boreholes worked back along the tunnel. It comes from the survey drawing the DASDAE proposal site carried, which turns out to specify every distance and every coordinate; the recipe follows it rather than inventing its own.
The tables are the point
Every track in the authoring format is a spreadsheet, so the page writes the CSV and renders it back rather than reciting twenty-three constructor calls a reader would skip. What stays as objects is what has no rows: the cables, enclosures, and interrogators, which share no fields, and the acquisitions.
The hardware is
resources/*.yaml, the tracks areoptical_components.csv,geometry.csv,coupling.csv, andannotations.csvunderpath.00, and the whole directory then loads withdc.inventory.What it documents that nothing else does
path.00@2024-09-01records that, the first path runs until the second begins, and a patch recorded across the boundary is subdivided byconform_to_inventoryrather than assigned to whichever epoch happened to be checked first. The same channel is ten meters down borehole 3 in one piece and eight in the other, which the page asserts.select(section="borehole")on a spool of one patch gives three, because the three holes are three disjoint runs of fiber and a patch is a dense block of channels.Executable, and derived rather than typed
Every
{python}block runs under the doc-code tests. The components table is the only place a distance is written down: the other three tracks are generated from its running totals, so they cannot drift out of step with it, and the repair is a five-row edit to one table rather than forty hand-shifted distances across four.The two figures come from the DASDAE inventory proposal site, which is being retired.
Review
Codex reviewed it and found eight things, of which the sharpest was that the figures and the page described different tunnels — the drawing has a 1500 m lead-in and 15 m links where the page had invented 40 m and 5 m. The page was rebuilt on the drawing. It also caught the
distance_maprunning out before the repaired path did, so the last two channels of the longer epoch resolved to nothing; the patch cord being described as buried trench fiber when the point of it is that it has no position; and three smaller claims that were not true of the implementation (sequenceis not a model field,Interrogatorhas no firmware, and a file named plainly.inventoryis not one of the accepted spellings).Changelog
Checklist
I have:
docs/contributing/general_guidelines.qmd).I have (if applicable):
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