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Site data from official registers

arcraum fetches the parcel, its official data and the Bodenrichtwert from the state's official services, and draws the plot's outline into the model. Only official sources are used, and each value keeps its source and licence.

Finding the parcel

  1. In the project settings, under Site, enter the site's latitude and longitude and save. Under Official land register, Fetch parcel then asks the state's register at that point.
  2. Instead, paste a position from BORIS, a geoportal or an online map into Position from a map. With a parcel number in it, the parcel is looked for around that position.
  3. Or type the Flurstückskennzeichen from an extract, or use Find at the address with the site's saved street and town (only Nordrhein-Westfalen and Hamburg have an official address search).
  4. Tick the fields to keep and click Take over selected: Gemarkung, Flur, Flurstück, the official area and the Kennzeichen. Found by a position or a Kennzeichen, taking it over also moves the site's point into the parcel.
  5. Taking a parcel over also sets the site's State (Land). Where nothing was taken over, choose it under Site. Its Landesbauordnung decides which storeys may count as Vollgeschosse in the key figures; without it, none are judged.

One take-over is one parcel. For a site on several parcels, take them over one after the other: the site then has the last one's values, so check the Flurstück numbers and the official area by hand.

What each state offers

  • Every state but Bayern finds a parcel at a point or a pasted position; in Bayern, a link to its own viewer is shown instead.
  • A Flurstückskennzeichen can be searched in every state except Bayern, Hamburg, Bremen and Saarland.
  • The search by address works only in Nordrhein-Westfalen and Hamburg.
  • Bodenrichtwerte can't be fetched everywhere. Where a state shows them in its own viewer only, a link to it is given.
  • The official map can't be fetched in every state either; where it can't, arcraum says so.

The Bodenrichtwert

  1. Under Bodenrichtwert, Fetch Bodenrichtwert shows the value per m² at the site's point, with its Stichtag and what it is for.
  2. Keep this value keeps it with its source. It is the value of a reference plot, so it never becomes a field of the site.
  3. In the Kostenschätzung, KG 100 as Land value × plot offers a kept Bodenrichtwert as the land value.

The plot outline in the model

  1. In the editor, choose Plot outline (PO, also in the zero point panel) and pick the source: the parcels taken over from the land register, a surveyor's point list pasted or opened as a file, or a site plan read with AI.
  2. If the project's zero point isn't on the map yet, choose where it goes (the middle of the parcel or one of its corners) and click Set zero point and import; only the project lead can. Otherwise click Import outline.
  3. The outline is drawn as a closed polyline on the plot boundary layer, on no storey, in one step. Zones of kept Bodenrichtwerte can come along on a layer of their own, where the state gives them.

Official map and site plan

  1. In the side panel's Underlays, Fetch official map places the state's cadastral map, a square of 100, 200 or 400 m around the zero point, true to scale on the plot boundary layer, so tracing on that layer snaps to its lines. It needs the zero point on the map, and not every state offers it.
  2. A Lageplan imported as an underlay can be read with Read site plan, if the office has switched on reading plans with AI. The plot outline dialog then opens on what was read.

Terrain heights

  1. Place surveyed heights with Terrain point (TP): click the point, then type its height. Together they make the ground in 3D.
  2. Once the project knows the height of ±0.00 above the datum, the Heights option takes NHN heights in metres as on the survey.