How Grundblik assesses land

Environmental and planning information for an address

Permanent reports may show complete V1/V2 contamination-map queries from DK-Jord, coastal flooding scenarios from Kystplanlægger for 2020 and 2070 at a 100-year event, and overlapping adopted local plans from Plandata. Cadastral geometry is compared with map polygons; boundary contact is conservatively treated as overlap. Results may concern only a small part of a parcel. Official plan documents are linked when supplied by the source. This is screening, not a decision about building rights or complete risk coverage.

Source queries must be complete before absence of overlap can be shown. Failed or incomplete queries remain unresolved. Absence of V1/V2 designation does not establish clean soil; general area classification and nearby contamination require separate checks. Coastal scenarios do not cover cloudburst, rivers or groundwater. A source-check timestamp is not the date of a field measurement. These additions do not change the interactive scoring formula.

Two views with different scope

The permanent address report shows a checked selection of registered facts and calculated distances. The interactive analysis examines more topics. The partial report’s information is not itself added up to an overall score because important risks and assumptions may be missing.

Which sources do we use?

Matriklen and DAR: cadastral geometry, area and verified address links. Klimadatastyrelsen’s urban boundaries and Statistics Denmark BY3: town reference points and population. Rejseplanen: dated timetable extracts for rail, Metro and light rail. STIL: registered schools and daycare. OpenStreetMap / Geofabrik: selected mapped locations including chain supermarkets (© OpenStreetMap contributors, ODbL). The Ministry of Taxation, Statistics Denmark, Aalborg University BUILD and GEUS: municipal rates, reported crime, radon observations and water hardness in supply areas.

Each result identifies its source and date. A municipal statistic is not a measurement at an individual property. Missing data, or data too old for the applicable check, are not replaced with invented results.

How are distances and shape calculated?

Address-report distances are straight-line great-circle distances from a reference point in the cadastral polygon to registered location coordinates. If the centre of the polygon’s bounding rectangle lies outside the parcel, a verified point from its geometry is used. Distances are not journey times or proof of public access. The nearest school is not necessarily the assigned catchment school.

Compactness is calculated as 4π × polygon area / perimeter². It is a shape indicator, not an approved building envelope. The map represents cadastral geometry schematically and is not a survey of legal boundaries.

What does a score mean?

The interactive analysis uses indicative component scores from 0 to 100 and an overall scale from 0 to 10. Only available criteria enter the weighted average. Missing criteria reduce data coverage and do not automatically receive favourable scores. Weighting expresses selected preferences and is not an official property valuation.

City access is weighted 60% major city, 30% local town and 10% Copenhagen. A major city has at least 50,000 residents; the best accessible city is selected using distance and population. The local component uses a 30% base plus a 70% square-root population factor. Its base weight is 13 before normalisation for missing data.

Verified conditions may trigger separate deductions from the overall 0–10 score: parcel area below 500 m², motorway proximity, V2 contamination designation and overlap with the checked coastal flooding scenario. Deductions and unresolved checks are shown with the score. Parcel-area deductions: 400–<500 m²: −0.25; 300–<400 m²: −0.50; 200–<300 m²: −0.75; below 200 m²: −1.00. The overall score cannot be negative.

What can the method not establish?

An address link or empty map layer does not establish that a parcel is risk-free. Map data do not replace radon measurements, geotechnical or contamination investigations, legal easement reviews, authority decisions or a current assessment of building condition. Residential-use screening does not establish that a particular project can be approved.

Updates and quality checks

Address data and sources are checked against source-specific age limits. Address and parcel must agree, and geometry and area must be valid. A page needs several dated sources and local information to enter the search-engine directory. Source failures produce explicit errors or missing data. Rechecking does not automatically change a page’s content date when its information is unchanged.

Templates and source processing are tested against known examples before expansion. New addresses are published in limited verified batches. Inclusion in a sitemap does not mean that Google has indexed or ranked a page.