Tapiontie 9 (Jämsä) is property 182-423-3-653. Its area, calculated from the map, is about 3,500 m². The building register lists one detached or semi-detached house on the property (floor area 79 m²).
The plan data lists detailed plan (Asemamäki) at the property. The detailed-plan data covers about 100% of the area calculated from the map. The named protected-area data has no matches for the property. The parcels fit within a rectangle of about 70 × 75 m (north–south × east–west). Streets of the addresses in the data: Tapiontie. In the selection of nearby properties, the closest is Tapiontie 7, Jämsä, about 50 m in a straight line.
Area is calculated from mapped parcel geometry. The official register area is not open data; it is on a (paid) property register extract from the National Land Survey (Maanmittauslaitos). How to get the official area
The address was linked to the property because its address point lies inside a parcel.
This summary combines 6 source datasets from National Land Survey of Finland and Finnish Environment Institute. Tonttikartta’s own processing: area calculated from the parcels’ map boundaries, building-register buildings matched to the property, land-use plan check for the property, protected-area overlap check and distances to nearby properties.
An illustration of the parcel shapes, with north at the top. No basemap; this is not a boundary survey.
Source: National Land Survey of Finland, cadastral index map · Open the property on the map
Overlapping mapped area: 3,483 m²
This dataset does not cover every plan level. Verify the full planning situation with the municipality.
This protection dataset contains no matches for the property. The result covers only the datasets named below.
The information covers the named source datasets. Overlapping areas cannot be added into a total protected area. This summary does not establish building rights.
Summary updated: .
Avaa kartta kiinteistön kohdalle näkymän tasoilla.
Kunnan (Jämsä) ja Maanmittauslaitoksen omat palvelut.
Municipal services and documents: Jämsä.
The National Land Survey of Finland’s cadastral index map describes property parcels and their mapped boundaries. Mapped boundaries do not replace cadastral survey documents or boundary markers on the ground.
Ryhti’s open address dataset contains addresses and locations available from the building information system. Property pages show address associations supported by the source data.
Ryhti’s open building dataset contains building locations and available register attributes. Coverage varies, and a missing building record does not establish that land is undeveloped.
The National Land Survey of Finland’s municipal division contains municipal geographic areas and identifiers. It is used to show a property’s municipality and administrative map context.
The Ryhti/VOOKA index compiled by the Finnish Environment Institute contains boundaries and document links for valid plans supplied by municipalities. The index is not the original municipal planning document and does not by itself establish building rights.
The Finnish Environment Institute’s protected-area dataset describes the geographic boundaries of published protected areas. Overlap is checked against mapped property boundaries at the source data’s precision.
Select a property on the map.
Click inside a cadastral palsta to see its property identifier, indicative dimensions, visible context and source details.
Measure what is visible without changing the map or its data.
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The file carries every measurement as WGS84 degrees and TM35FIN metres · indicative, not register coordinates. It holds every measurement you have finished, not one you are still drawing.
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Layers marked “external” depend on the named provider’s service availability.
Layers marked “external” depend on the named provider’s service availability.
Beta · This experimental service may contain errors or interruptions. Verify important details with the original provider.
Explore property boundaries, buildings and surroundings across Finland. Search by address or property identifier and measure distances and areas.
Tonttikartta collates and combines data from several open sources and synthesises it into one summary per property. People use the summaries on the map and the property pages; AI assistants use them through the API, the MCP server and llms.txt.
Figures are rounded and describe the data in this release. Tonttikartta is not an official register.
Tonttikartta is provided by OPL Consulting Oy.
Copy this prompt into Claude, ChatGPT or another assistant that can fetch web pages. It can then look up a property for you and hand you the map link.
Tonttikartta is still experimental and under active development. Features, coverage and presentation may change, and errors or interruptions are possible. Feedback helps us improve the service.
The map brings together public sources, including authorities’ open geospatial datasets. Each section’s “?” names its sources: the provider, licence and dates, with links to the provider’s own service. The map’s credits are in its corner, and every provider with its licence is listed below. Coverage, accuracy and publication dates vary by source. Layers and information marked as external data or an external service come directly from the named provider’s own service, not from Tonttikartta’s processing; Tonttikartta is not responsible for their content, currency or availability.
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Municipalities without a verified open planning-project feed still carry their municipal planning links and national standing plans; a feed with zero projects never means a place has no plans.
Select a property, then open the “?” on Register and location, the last card. Use the property identifier at the top of the card to find registry records. Karttapaikka opens the map location; it is not a registry extract. The National Land Survey’s instructions explain how to obtain official property, ownership and encumbrance extracts. Orders may require sign-in and payment.
Official registry extracts: instructions ↗For planning, building permits and restrictions, follow the document links where available and confirm the current situation with the municipality or responsible authority. General provider pages require a location or record search. Compare the source date, coverage and exact property—not just the map appearance.
Tonttikartta is an aid to exploration, not an official register, survey or authority decision. OPL Consulting Oy is not responsible for errors in the original public-source content and does not guarantee its accuracy, completeness or currency. Verify information with the original provider and the relevant authority before a purchase, construction project or other consequential decision.
Email info@tonttikartta.fi with a map link or property identifier, the layer concerned, a description of the mismatch, and a verifiable source with its date. A screenshot helps. We can investigate and correct demonstrable errors in our processing or presentation. Corrections to the original source record belong to its provider; we cannot change an authority’s register.
No. A layer may be switched off, visible only at certain zoom levels, unavailable or incomplete. An empty result does not prove that a restriction, feature or right is absent. Check the original source and the relevant authority.
Different datasets are published and imported on different schedules. The map is not a real-time copy of every source. Check any date shown with the information and consult the provider for its latest record.
Availability varies by location and source. Some layers appear only when you zoom in.
Property listings on the map are a planned feature for owners and agencies. They are not available yet, and there is no schedule or announced launch date. To discuss interest or cooperation, email info@tonttikartta.fi.
Search for an address, place name, property identifier or coordinates. Zoom in and select a property to open its details. Use Layers to choose the information shown and Tools for measurements and other ways to explore the map.
Search for the address or property identifier and zoom in: the property’s boundaries are drawn on the map from the National Land Survey’s cadastral data, and selecting it highlights every parcel that belongs to it. The boundaries are indicative and do not establish a boundary on the ground.
Search for the address and select the property on the map. Its property identifier is shown at the top of the property details, and Copy property identifier copies it. You can also search the other way round, from a property identifier to the property.
Select the property: its details show an area calculated from the parcel boundaries on the map. It is not the official area, because the property register's area is not open data; a property register extract shows it. To measure any other area or distance, use the measuring tools under Tools.
Select the property and open Standing plans under Planning: it lists the regional, master and detailed plans in force on the property, with links to the plan record and documents where the sources provide them. Coverage varies by municipality; the municipality confirms the plan in force.
Yes. Choose Aerial imagery as the base map under Layers to see the National Land Survey’s orthophotos with the property boundaries on top. Historical imagery is available as a separate layer.
They are indicative. Map scale, source geometry, terrain resolution and browser calculations affect the result. A map boundary does not establish a boundary on the ground, and a calculated area or sunlight estimate is not a survey or a site assessment.
Use the map’s sharing control to copy a link and the property’s print control to create a Tonttikortti. Keep source credits and limitations with anything you share. Source datasets retain their own licences; the service copyright does not replace them.
Questions, feedback or a verifiable data mismatch? Contact us by email. Please include enough detail for us to find the location and reproduce the issue.
info@tonttikartta.fiProperties by municipality · Addresses A–Z · Public API guide
Our proprietary Maasto engine renders the maps and supports rapid prototyping and AI agent integration.
Version 26 September 2026 · Provider: OPL Consulting Oy (Y-tunnus 3222631-1) · info@tonttikartta.fi
These terms govern access to Tonttikartta and its map services. You may browse the service for your own personal or professional information needs, share map links and use its printing function, retaining source credits and limitations. Other uses require the permissions described below.
Without OPL Consulting Oy’s prior written consent, you must not bulk download, scrape or systematically collect content from Tonttikartta, whether automatically or manually. You must not use the service, its endpoints, map tiles or outputs as a backend, data feed, embedded map or other component of another service, or reproduce a substantial part of it. This applies to commercial and non-commercial services. Ordinary sharing of a map link is allowed. General web search engines may crawl and index the public pages as robots.txt allows. As an exception, the documented public API — GET /api/v1/lookup, described at tonttikartta.fi/api/v1/docs — may be queried automatically, including by AI assistants, to answer individual requests within its published request and response limits and these terms, keeping source credits, at least the short disclaimer, and the caveats that apply to the facts shared with the information. Single property pages under tonttikartta.fi/kiinteisto/ may be read automatically on the same terms, one property per request. That permission covers individual lookups and individual property pages only: bulk or systematic enumeration, storing responses or pages as a dataset or property index of your own, and use of any other endpoint, map tile or page still require the consent described above. Request permission at info@tonttikartta.fi.
Do not bypass access controls or rate limits, disrupt the service, impose unreasonable load or use it unlawfully. We may restrict access where reasonably necessary to address misuse, security risks or service stability.
OPL Consulting Oy retains its rights in the Tonttikartta service and proprietary Maasto engine. Third-party software and datasets retain their own rights and licences. These terms govern use of our service; they do not revoke rights granted by open-data licences or restrict obtaining public datasets directly from their providers under the providers’ terms.
Tonttikartta is based on public sources; it is not an official registry, survey, valuation or authority decision. Original content is the responsibility of its provider; we do not guarantee its accuracy, completeness or currency. Boundaries, measurements and estimates are indicative. Verify consequential facts with the original registry and relevant authority. We investigate demonstrable mismatches in our processing or presentation when supplied with a verifiable source; changes to an original register belong to its provider.
We do not promise uninterrupted availability. To the extent permitted by law, OPL Consulting Oy is not liable for losses caused by reliance on original-source errors or service interruptions. Nothing in these terms limits mandatory consumer rights or liability that cannot lawfully be excluded, including liability for intentional misconduct or gross negligence.
Linked services have their own terms and privacy practices. Cookie choices are explained separately under Cookies and privacy. Features may change during beta; property listings are planned without a timetable and would have separate publishing terms. We will publish updated terms with a version date and give advance notice of material changes affecting use. Finnish law applies, without limiting mandatory protections applicable to consumers. For permissions, questions or complaints, contact info@tonttikartta.fi.
On the hosted site, maasto-session protects service access and rate limits (up to 24 hours), and maasto-version-key keeps a consistent release during a rollout (up to 7 days). If our hosting infrastructure runs an automated security check on your visit, it may also set a short-lived cookie to confirm the check has passed. Your selected language, layers and map preferences are stored on this device until you change them or clear site data.
On its own server the service keeps two aggregate counts: how many times a session cookie has been issued, and how many times a property card’s information has been served. Each is a count plus the kind of page it came from, the language it was served in and whether the card came from cache — no IP address, no browser identification, no session token, no property identifier and no coordinates. Nothing is stored in or read from your browser for them, they are kept for three months, and they are counted the same way whatever advertising choice was made.
Anonymous aggregate usage counts do not depend on your advertising choice. Earlier optional measurement choices saved on this device do not authorize advertising or Google Analytics. Use Advertising privacy choices to review or change Google’s advertising settings.
Google AdSense provides advertising on this site. Google’s certified consent platform records your advertising choices, and Google decides from them which ads it may serve. Without optional consent, Google may serve eligible limited ads. With consent to store or access information on your device, it may serve non-personalized ads that use cookies for functions such as frequency capping and reporting. Ads are personalized only if you also consent to Google creating a personalized advertising profile and using it to select ads. Declining or withdrawing these permissions does not affect the map or property information. Google and its advertising partners may process IP addresses to deliver ads and use fraud-prevention storage. The privacy choices explain the purposes and partners and let you review, decline or change optional permissions at any time. We add no property identifiers, addresses or coordinates to ad requests as targeting data; Google’s tag can still see the page address and its content.
We count request deliveries on our servers to understand general usage: map and address pages, directories, information pages, lookups, searches and property cards, grouped by day, category, response status, whether the request came from a search-engine or other crawler or from a browser, and, for browsers, whether the visit followed a search-engine result. These counts include repeat requests; they are not unique visitor counts. The aggregate dataset contains no IP addresses, browser identifiers, cookies, addresses, search terms, property identifiers or coordinates and is retained for three months. No analytics cookies or visitor identifiers are created for it.
We use Google Analytics only if you allow it. The service asks for your choice on your first visit and saves it on this device (tonttikartta.analytics.v1) for six months. Until you allow it, and if you decline, Google Analytics is not loaded and nothing is sent to it. If you allow it, Google Analytics sets its cookies (_ga) and records which views and features are opened; Google processes this data on our behalf and may process it outside the EU. Use Analytics choice below to change or withdraw your choice; withdrawing removes the Google Analytics cookies.
When you select a property, our server sends its location to Google to check Street View coverage. The viewer loads from Google only when you open its section in the property card. Google then receives your IP address, the requested location and this site's origin, and processes the visit under its own privacy policy. Closing the section removes the viewer. Google Maps, OpenStreetMap and Karttapaikka links open their respective services only when followed.
How Google uses information from sites and apps that use its services · Google privacy policy
The service provider is OPL Consulting Oy. For privacy questions and requests concerning your information, contact info@tonttikartta.fi.
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