# ParcelSignal

> Czech land intelligence: see the plan, score the parcel and source the land.

[Canonical HTML landing page](https://parcelsignal.hlstc.io/)

[Open the interactive map](https://parcelsignal.hlstc.io/map)

ParcelSignal turns municipal land-use plans — especially the Hlavní výkres — into parcel-level zoning, buildability and constraint context joined to the national cadastre. It is designed to help screen land in minutes rather than reconcile many separate portals and documents for every plot.

ParcelSignal is a preliminary screening product. Parcel classifications, scores, mapped constraints and network results are indicative; official confirmation is required before relying on them for a legal, planning, purchase or construction decision.

## The problem

Assessing whether a Czech parcel may be suitable for development can require reconciling the cadastre, a land-use-plan drawing, protected areas, flood zones, soil grades, road access, utility context and sale signals. Those records are published in different portals, formats and coordinate systems, and many municipal plans are images rather than structured data.

## From Hlavní výkres to parcel data

ParcelSignal's planning workflow has three steps:

1. **Ingest the plan.** Read coloured zones, boundaries and legend swatches from the municipality's published source, whether it is a GIS feed, digital PDF, scanned sheet or WMS image.
2. **Match it to the cadastre.** Georeference the plan, interpret its legend and associate the plan's zones with cadastral parcels.
3. **Answer per parcel.** Present the dominant planning class, exact RZV code when available, existing-versus-proposed status, buildability context and the use split when a parcel spans multiple zones.

## Product

The interactive map combines structured regional search, map layers and a parcel card.

- **Region-scoped search:** filter by kraj, okres and obec, parcel area, land type, planning class, buildability, soil grade, price, deal signals and suitability profile.
- **Layered map:** inspect regions, parcels, planning zones, buildability, the original georeferenced plan raster and available protection, infrastructure and context layers.
- **Parcel card:** assemble available planning, building, buildability, soil, transport, noise, utility, deal-signal and explicit on-demand solar context, with source information.

## Planning engine

ParcelSignal uses document processing, computer vision and GIS to turn municipal planning sources into a shared 14-class search taxonomy. It ingests the format a municipality actually publishes: standardized GIS data, regional feeds, born-digital PDFs, scanned sheets or WMS imagery. When a reliable classification cannot be made, the result may remain unknown.

The shared taxonomy helps compare municipalities. It does not replace the source plan's exact legend, written regulations or an authority's binding interpretation.

## Use cases and scoring

Suitability profiles support residential and commercial development, industrial and logistics screening, solar and battery-storage screening, and analyst or broker shortlisting. Scores are deterministic and reason-coded so the interface can show why a parcel passed, failed or remains uncertain. They are prioritisation aids, not permit decisions or legal opinions.

## Sources and explainability

ParcelSignal aims to retain source context for parcel fields and plan-derived answers. The public landing page names these source publishers or groups: ČÚZK, AOPK ČR, Česká geologická služba (ČGS), European Commission Joint Research Centre (JRC), Statutární město Brno, IPR Praha / EKOLA, CENIA, SPÚ, MZČR, OpenStreetMap / Geofabrik, Město Plzeň, Statutární město Ostrava, VÚV T.G.M., ŘSD, MMR / ÚÚR and NGÚP, municipalities, mapy.gov.cz, ČEZ Distribuce, regional DTM operators, CEVD, ÚZSVM and other portals, ISIR, Portál dražeb, Digitální a informační agentura (RNNV), ERÚ and MŽP (IRZ, VISOH2 waste-facility registry).

The MŽP/VISOH2 landfill-family layer is implemented but remains unavailable until its first production load and browser acceptance. It uses official registry points for landfill, landfill-reclamation and landfill-construction facilities; these points are not facility footprints and do not make the inventory complete for historical or illegal dumping sites.

The live MŽP SEKM3 layer is a point inventory of contaminated and potentially contaminated sites. The public open CSV and anonymous SEKM map do not publish contamination polygons, so ParcelSignal does not invent extents or buffers. Map popups and parcel cards link the source ID to the official SEKM record route (the portal may require sign-in), with the [anonymous official catalogue](https://www.sekm.cz/portal/areasource/map_search_public/) as the fallback. Distance is to the evidence point; an absent record is not proof of clean ground.

The ČGS mining layer uses the official `dulni_dila.zip` open-data register. It offers a general mine-work view and a separate `Oznámená / stará / opuštěná důlní díla` view based on the register's own identifiers and categories. These are inventory points, not mapped underground extents; the separate view is not a second, independently measured dataset.

The uranium-legacy view is positive-only and uses only the publisher's commodity attribute across mine works and IUM. A uranium string is `explicit`; `Radioaktivní suroviny` is `possible`. Place names, managers and proximity are not classification evidence. These points are not contamination or dose measurements, and absence is not an all-clear.

Source coverage, currency, accuracy, licence terms and official status vary. A source publisher's current record and official interpretation take precedence over ParcelSignal's screening view. Where available, CzechInvest industrial-zone inventory points add a declared site area and public-support context; they do not state actual electricity or gas consumption, spare connection capacity, a surveyed zone boundary or a binding development commitment.

## Coverage shown on the landing page

The landing page's current product snapshot reports:

- 22,003,254 cadastral parcels across Czechia;
- 6,297 land-use-plan documents for 5,398 of 6,258 municipalities;
- 3,463,413 parsed planning zones and 4,172,452 parcel-level planning classes;
- 4,232,450 RÚIAN buildings, including 2,541,615 with a completion date;
- 51,484 Záměry or EIA records, including 28,895 associated with parcels;
- 2,776,776 constraint features across flood, soil, noise, rail, road, protected-area and grid-capacity categories;
- 109,934 sale signals, 24,851 municipal notices, 37,911 licensed power plants and 3,513 IRZ facilities.

The cadastral base is nationwide, but planning and thematic layers are not. At this snapshot, ParcelSignal had not found a readable land-use-plan document for 860 municipalities. A missing item is a data gap, not evidence that a restriction, network or development does not exist.

## Radon50 geological model

ParcelSignal publishes the **Česká geologická služba (ČGS) Radon50** regional expected radon-index model at 1:50,000. The current active ParcelSignal publication covers all 6,258 Czech municipalities. The map and parcel card may report a medium or high expected-risk class where the model intersects a parcel; search deliberately does not offer a “low” class as a safety certificate.

Radon50 is a regional geological model. It is not an indoor radon measurement, a measurement of a selected building, or a determination of the radon index of a specific construction parcel. It is also separate from municipality-level statistics based on historical indoor measurements. For an existing building, a material decision requires an appropriate long-term indoor measurement. For a construction parcel or new build, it requires a direct on-site radon-index determination based on soil-gas concentration and ground permeability. Both require professional interpretation. Source and scientific limitation: [official ČGS Radon50 metadata](https://micka.geology.cz/record/basic/5cf8e0be-36a4-4fcc-ab1d-53770a010852).

## NPÚ SAS/ÚAN archaeology (publication pending)

The production-ready archaeology publication uses the official explicit polygon inventory of the **Národní památkový ústav (NPÚ)** SAS/ÚAN service: ÚAN I, ÚAN II, the separately published ÚAN II band and ÚAN IV. The 2026-08-13 source preflight counted 22,598 / 9,850 / 2,717 / 620 active polygons respectively (35,785 total), with fail-closed shrink guards. It is an official inventory and procedural screening signal, separate from the existing heritage-monument (ÚSKP) signal. It is not live until the complete national load and production browser acceptance pass.

All public readers will use only one fully reconciled active national generation. Outside an explicit polygon, the screening meaning remains implicit category III, where archaeological finds cannot be excluded. “No explicit ÚAN” is not an archaeological all-clear, a permit or a substitute for the statutory procedure and NPÚ/authority assessment. Source: [official NPÚ metadata](https://geoportal.npu.cz/metadataserver/record/basic/F7CD9912-E89F-415E-9582-C49C3D67784B?do=changeLocale). Licence: CC BY-SA 4.0; attribution: Národní památkový ústav.

## Solar potential

Opening a parcel card automatically starts a European Commission JRC PVGIS 5.3 regional estimate normalized to a fixed 1 kWp reference system; moving the map does not. Where the active RÚIAN × DMP OK × DMR 5G inputs support a coherent representative roof plane, ParcelSignal can also show screening panel sizing and expected yield with its assumptions, coverage, confidence and source versions. The same result can be included in the PDF.

This is not a roof survey, exact roof-facet reconstruction, final module layout, structural assessment or grid-connection offer. A map layer shows the derived orientation/slope suitability of coherent published roof models without calling JRC during map movement. The versioned horizon model samples 36 directions in two retained passes: DMP OK local surface obstacles to 2 km and DMR 5G bare-earth terrain to 50 km. An optional z≥14 vector layer colours adaptive cells by the scalar share of sky obstructed by distant terrain; its popup exposes resolution, error and coverage, while the parcel card plots the original 36-direction profile as SVG. The scalar layer is visualization only. The surface captures local obstacles but does not classify them as vegetation, chimneys, pipes or roof furniture. Coverage is explicit.

## Cadastre and official checks

Live cadastral look-ups can return parcel and building facts and the title-sheet (LV) number. ParcelSignal deliberately does not provide owner names.

On-demand electricity, gas and water checks can use or direct users to official services, but they remain non-binding. Network locations, proximity and possible protection corridors are indicative. DTM/DMVS or operator data is not claimed to be a complete nationwide bulk inventory. Obtain an official statement from the relevant network owner or operator and confirmation from the competent authority for material decisions.

The ČÚZK DMVS map integration has two deliberately separate views. **Originál DMVS** requests a bounded official WMS image through the ParcelSignal backend cache and places it on the map in Web Mercator. The optional analytical layers are raster-derived from bounded cells and reconstruct indicative route axes; they are not the original WMS, not an official vector and are disabled by default. The source catalogue covers all 16 published technical-infrastructure themes and four connection themes. Electrical routes (`el_ved`) and electrical connections (`el_ved_prip`) are reconstructed and published separately. Every returned `GetFeatureInfo` property is retained, with usable depth, diameter, pressure, voltage and placement values also normalized. A legal or safety corridor is calculated only when the required attributes are available; otherwise a visible band is explicitly labelled non-legal screening context. This is not municipality-wide or national coverage or a surveyed route. Derived output remains marked `notOfficialVector=true` and requires confirmation from the network owner or operator.

The DMVS artefact preserves DMVS provenance and never receives an OSM identifier or link; any OSM infrastructure screening remains a separate source and product path.

Bounded WMS caching and derived MVP publication are a product-policy acknowledgement, not provider or legal approval; the licence/legal review remains open and is recorded separately.

## Current public military sites

The separate military-sites layer combines official ČSÚ RSO polygons for the four military districts with attributed public OpenStreetMap geometries explicitly mapped as current barracks, training areas, air bases or military areas. The source partitions and identifiers remain separate, and each result links to its exact OSM object or exact RSO record query. Parcel cards, PDF and search use exact parcel-to-published-geometry distance, with 0 m on intersection. A municipality or garrison-name centroid is never substituted.

This is an incomplete public inventory. No nearby published feature means unknown, not “no military site”; the product does not infer or expose non-public operational details.

## ČÚZK ZABAGED AM060 bunkers

The live point layer contains 6,100 official ČÚZK ZABAGED® AM060 inventory records with their official type, designation/name and source link. Parcel proximity is a separate derived publication. It remains unavailable until an indexed, resumable cycle has certified all 6,258 municipalities and exactly one nearest record for every live parcel under one atomic generation pointer.

Until that first national promotion, the parcel card, search and PDF report the proximity source unavailable rather than “no bunker”. An AM060 point does not delineate underground extent, ownership, public access, structural safety or heritage protection.

### Technická infrastruktura DMVS

Veřejný WMS a `GetFeatureInfo` v DMVS slouží k orientačnímu zobrazení a přečtení atributů vybraného objektu. Odpověď neposkytuje znovupoužitelnou vektorovou geometrii (pole `geometry` může být `null` nebo zcela chybět); ParcelSignal z ní nemůže autoritativně předpočítat ochranný koridor ani jeho průnik s parcelou.

| Typ sítě | Téma DMVS | Veřejný WMS / GetFeatureInfo | Úplná vektorová data TI |
|---|---|---|---|
| Voda | `voda` | zobrazení + atributy, bez znovupoužitelné geometrie | oprávněný přístup nebo vyjádření provozovatele |
| Kanalizace | `kan` | zobrazení + atributy, bez znovupoužitelné geometrie | oprávněný přístup nebo vyjádření provozovatele |
| Plyn | `plyn` | zobrazení + atributy, bez znovupoužitelné geometrie | oprávněný přístup nebo vyjádření provozovatele |
| Ropa a produktovody | `produkt` | zobrazení + atributy, bez znovupoužitelné geometrie | oprávněný přístup nebo vyjádření provozovatele |
| Teplo | `teplo` | zobrazení + atributy, bez znovupoužitelné geometrie | oprávněný přístup nebo vyjádření provozovatele |
| Elektrické vedení | `el_ved` | zobrazení + atributy, bez znovupoužitelné geometrie | oprávněný přístup nebo vyjádření provozovatele |
| Elektronické komunikace | `el_kom` | zobrazení + atributy, bez znovupoužitelné geometrie | oprávněný přístup nebo vyjádření provozovatele |

Připravené datové sady se získávají po přihlášení registrovaného uživatele přes portál; volání webových služeb vyžaduje certifikát. Rozsah dostupných dat a případné doložení účelu závisí na roli uživatele a požadovaném výdeji. ČÚZK tím obecně negarantuje kompletní vektorovou síť pro libovolného žadatele. Aktuální podmínky jsou na stránce [Poskytování dat DTM z IS DMVS](https://www.cuzk.gov.cz/DMVS/Poskytovani-dat.aspx). Alternativou je vyžádat si oficiální vyjádření vlastníka nebo provozovatele sítě. OSM může ParcelSignal použít pro orientační, neautoritativní screening; nenahrazuje oficiální geometrii, vytyčení ani určení ochranného pásma.

## Continue

- [Explore the live parcel map](https://parcelsignal.hlstc.io/map)
- [Read the short LLM navigation file](https://parcelsignal.hlstc.io/llms.txt)
- [Read the expanded LLM context](https://parcelsignal.hlstc.io/llms-full.txt)
The map exposes ČÚZK DMP OK as one optional surface layer with three server-rendered views: absolute surface elevation (hypsometry), multidirectional hillshade, and relative height above DMR 5G terrain. The national z14–16 pyramid is built offline from official ATOM bulk files and public requests only read verified immutable PNGs from R2; map movement never starts source download or raster calculation. DMP is an unclassified visible surface and cannot by itself distinguish roofs, vegetation or technical objects.