Legal documents
Image sources and licences
Authors, licences and sources of the images, 3D models and software used on this website – in one transparent list.
How to read this list
- The “Changes” column shows whether we resized the source file. On the website the images are additionally converted to web formats (WebP/JPEG) in several sizes; this does not change their content.
- Where an image is cropped, recoloured or overlaid with a heat map on the website, the caption of that image says so. Adapted CC BY-SA images are shared under the same licence.
- A licence does not replace rights relating to persons, number plates, trademarks and buildings shown in an image; naming companies or brands in an image does not imply endorsement or any relationship.
- This list covers every item in the site’s image library; not every image appears on every page.
Example 1 – family house: facade, thermal bridge, roof
Real thermal images under open licences, plus a CC0 3D house pack for the illustration. (11)
| Image | Title and source | Author | Licence | Changes |
|---|---|---|---|---|
 | Pont thermique thermographie infrarouge Briq Formation Thermal bridge on a Paris residential building (2026) Source: Wikimedia Commons | Thibault LEMONNIER | CC BY 4.0 | Not modified |
 | Termovizní snímek rodinného domu Thermogram of a family house facade with temperature scale (CZ) Source: Wikimedia Commons | Radim.vesely | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Thermografie Giebelseite Thermogram of a residential gable side at night Source: Wikimedia Commons | BuLService | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Ungedaemmte Aussenwand Thermogram of a house with uninsulated exterior wall Source: Wikimedia Commons | Lutz Weidner | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Termowizja Thermal + visual split view of a brick gable house Source: Wikimedia Commons | Explorer1001 | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Cambo 626 Visual and thermal image of a timber house (Cambodia) Source: Wikimedia Commons | Cam42 | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
| 3D model | City Kit (Suburban) 2.0 Kenney City Kit (Suburban) - low-poly family houses (GLB) Source: kenney.nl | Kenney (www.kenney.nl) | CC0 1.0 Universal (Public Domain) | Not modified |
 | COLOR THERMOGRAPH SHOWING HEAT LOSS - NARA - 17419418 NASA colour thermograph of houses (Cleveland, 1977) Source: Wikimedia Commons | NASA / U.S. National Archives (NARA ID 17419418), unknown author | Public Domain (US government work) | Resized for web |
 | Passivhaus thermogram gedaemmt ungedaemmt Passivhaus vs. conventional building thermogram Source: Wikimedia Commons | Passivhaus Institut | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | SnowRoof Neige toiture Row houses: snow melted unevenly on roofs (visual) Source: Wikimedia Commons | F Lamiot | CC BY 2.5 | Not modified |
 | FensterIR Blower Door Roof window leakage under blower-door test (thermal) Source: Wikimedia Commons | Sönke Krüll | CC BY 3.0 | Not modified |
Example 2 – electrical overheating (cables, breakers, terminals)
Open-licensed thermal images of electrical hot spots and warming equipment. (9)
| Image | Title and source | Author | Licence | Changes |
|---|---|---|---|---|
 | Défaut de connexion décelé grâce à la thermographie infrarouge utilisée en maintenance préventive des installations électriques Connection fault on a three-phase breaker (69 C) Source: Wikimedia Commons | Contrôles-électriques | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Surcharge sur un disjoncteur électrique thermographie infrarouge Overloaded circuit breaker (73 C) in a distribution board Source: Wikimedia Commons | Contrôles-électriques | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | AFCIs Infrared Breaker panel with two warm AFCI devices Source: Wikimedia Commons | Tenbergen | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Elektroschuetz Overheated cable connection on a contactor Source: Wikimedia Commons | Sönke Krüll | CC BY 3.0 | Not modified |
 | Electric motor thermal image Electric motor heat distribution (CC0) Source: Wikimedia Commons | Zaereth | CC0 | Not modified |
 | Electrical fault Overheating industrial fuse block Source: Wikimedia Commons | Hotflashhome | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Défaut de connexion porte fusibles thermographie infrarouge Fuse-holder connection fault: thermal image + visual photo pair Source: Wikimedia Commons | Contrôles-électriques | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Horizontal motor Two motors with hot bearing/end-bell areas Source: Wikimedia Commons | Hotflashhome | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Linear load Hot connection in an electrical panel (CC0) Source: Wikimedia Commons | Basicinfrared | CC0 | Not modified |
Example 3 – buried pipe, aerial thermography, district heating
Aerial and ground-level thermal images, district-heating sections and heat-station photographs. (10)
| Image | Title and source | Author | Licence | Changes |
|---|---|---|---|---|
 | Hőközpont meleg vizes blokk részlete District heating substation, hot-water block (Budapest) Source: Wikimedia Commons | InterCity(IC) | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Travaux d'installation du chauffage urbain à Rennes sur la rue de Fougères District heating pre-insulated pipes laid in a street (Rennes) Source: Wikimedia Commons | Abujoy | CC BY 4.0 | Resized for web |
 | Luftbild Gartenbauzentrale eG Papenburg Drone aerial of a logistics centre with solar roof (RGB) Source: Wikimedia Commons | Gartenbauzentrale | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Luftaufnahme Inspektion Wärmebild Drone view of a road: visual + thermal side by side Source: Wikimedia Commons | Coptercloud | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | DroneMapper UAS Thermal Imagery UAS thermal orthomosaic of an industrial roof complex Source: Wikimedia Commons | Stoermerjp | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Heated pavement Thermal image of heated pavement: buried heating lines visible from above Source: Wikimedia Commons | Saninfo1993 | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Pre-installation insulated underground pipes for district heating Pre-insulated bonded district heating pipes (with leak-detection wires) Source: Wikimedia Commons | Mike1024 | Public Domain (released by author) | Resized for web |
 | Figure 10 - UAV-based thermal anomaly detection for distributed heating networks UAV thermal orthophoto of a district heating network with detected anomalies (flight site 1) Source: ISPRS Archives | A. Sledz, J. Unger, C. Heipke (Leibniz University Hannover) | CC BY 4.0 | Not modified |
 | Figure 11 - UAV-based thermal anomaly detection for distributed heating networks UAV thermal orthophoto of a district heating network with detected anomalies (flight site 2) Source: ISPRS Archives | A. Sledz, J. Unger, C. Heipke (Leibniz University Hannover) | CC BY 4.0 | Not modified |
 | Figure 12 - UAV-based thermal anomaly detection for distributed heating networks UAV thermal orthophoto of a district heating network with detected anomalies (flight site 3) Source: ISPRS Archives | A. Sledz, J. Unger, C. Heipke (Leibniz University Hannover) | CC BY 4.0 | Not modified |
General images (industry, solar, drone, warehouse)
General photographs for service and sector pages. (15)
| Image | Title and source | Author | Licence | Changes |
|---|---|---|---|---|
 | Engineer in Industrial Factory Using Tablet Source: Pexels | Sergey Sergeev | Pexels License | Resized for web |
 | Worker Standing Between Solar Panels Source: Pexels | ThisIsEngineering | Pexels License | Resized for web |
 | A Thermal Image on a Tablet Source: Pexels | cottonbro studio | Pexels License | Resized for web |
 | Rooftop of Warehouse Source: Pexels | Jonathan Cooper (The Shutter Vision) | Pexels License | Resized for web |
 | Ladányi winery in Tokaj Ladányi winery, Tokaj (portrait) Source: Wikimedia Commons | Андрей Романенко | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Bormúzeum - Tolcsva, 2014.06.18 (10) Wine museum interior with barrels and press, Tolcsva (Tokaj wine region) Source: Wikimedia Commons | Derzsi Elekes Andor | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Resized for web |
 | Weinkeller Tokai Hillside wine cellar entrances in Tokaj Source: Wikimedia Commons | MyName (Wikimedia Commons user; uploaded by Verita) | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Resized for web |
 | Gray and black DJI Mavic Pro quadcopter drone on mid top air near forest at daytime Source: Unsplash | Clay Banks | Unsplash License | Resized for web |
 | Electrician testing electrical panel with multimeter Source: Unsplash | Toolmash Expo | Unsplash License | Resized for web |
 | Electrician testing electrical panel Source: Unsplash | colsan ltda | Unsplash License | Resized for web |
 | A row of semi trucks parked next to each other Source: Unsplash | Tom Jackson | Unsplash License | Resized for web |
 | Glass refrigerated display cases filled with rows of yogurt in a grocery store Source: Unsplash | Eduardo Soares | Unsplash License | Resized for web |
 | Electrical switch box with circuit breakers Source: Unsplash | Markus Spiske | Unsplash License | Resized for web |
 | A semi truck is loaded with white bags Source: Unsplash | Zemos | Unsplash License | Resized for web |
 | Empty modern warehouse interior with polished concrete floor Source: Unsplash | Craftsman Concrete Floors | Unsplash License | Resized for web |
Towns – local photographs
Photographs of the towns in our service area. (18)
| Image | Title and source | Author | Licence | Changes |
|---|---|---|---|---|
 | Hajdúböszörmény - Bocskai tér Bocskai square, Hajdúböszörmény Source: Wikimedia Commons | tamashorvath.com | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Hajdúböszörmény, városháza 2021 01 Town hall, Hajdúböszörmény Source: Wikimedia Commons | Pasztilla aka Attila Terbócs | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Hajdúnánás látképe légi felvételen Aerial view of Hajdúnánás Source: Wikimedia Commons | Civertan | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Fountain and Reformed church, 2017 Hajdúnánás Fountain and Reformed church, Hajdúnánás Source: Wikimedia Commons | Globetrotter19 | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Castle and Lake, 2017 Kisvárda Castle and lake, Kisvárda Source: Wikimedia Commons | Globetrotter19 | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | District heating plant, chimney, 2017 Kisvárda District heating plant chimney, Kisvárda Source: Wikimedia Commons | Globetrotter19 | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | County Hall, Nyíregyháza County Hall (Megyeháza), Nyíregyháza Source: Wikimedia Commons | József Rozsnyai | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Saint Nicholas Greek Catholic Cathedral, 2017 Nyíregyháza Saint Nicholas Greek Catholic Cathedral, Nyíregyháza Source: Wikimedia Commons | Globetrotter19 | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | R.k. templom (5380. számú műemlék) Roman Catholic church, Polgár Source: Wikimedia Commons | tilet | CC BY-SA 2.5 hu Adaptations must be shared under the same licence. | Not modified |
 | Csirketelep1 Poultry farm, Polgár Source: Wikimedia Commons | Hadar Dávid | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Castle of Szerencs (01) Castle of Szerencs Source: Wikimedia Commons | Gulyastorm | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Szerencs 1 Szerencs town centre Source: Wikimedia Commons | Szerencsi at Hungarian Wikipedia | CC BY-SA 3.0 Adaptations must be shared under the same licence. | Not modified |
 | Tiszaújváros 2012, Olefingyár Olefin plant, Tiszaújváros (2012) Source: Wikimedia Commons | Bodros | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Not modified |
 | Tiszaújvárosi Sportpark Sportpark, Tiszaújváros Source: Wikimedia Commons | Rhinen | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Tiszavasvári belváros Tiszavasvári town centre Source: Wikimedia Commons | Vámos Alex | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Dessewffy-kastély (Tiszavasvári) Dessewffy Castle, Tiszavasvári Source: Wikimedia Commons | Vámos Alex | CC BY-SA 4.0 Adaptations must be shared under the same licence. | Resized for web |
 | Tokaj (1) Main street of Tokaj Source: Wikimedia Commons | Elekes Andor | CC BY 4.0 | Resized for web |
 | Tokaj Rakoczi pince Rákóczi cellar, Tokaj Source: Wikimedia Commons | PM | Public Domain (released by author) | Resized for web |
Third-party software and fonts
The website uses open-source software and fonts. Fonts are served from our own server; we use no external font or tracking services. Licence texts are available at the linked locations.
Components delivered to visitors
| Name | Licence | Copyright notice | Use |
|---|---|---|---|
| three.js 0.186 | MIT | © 2010–2026 three.js authors | The 3D heat-map viewer (loaded only when the viewer opens). |
| Astro 7 | MIT | © 2021 Fred K. Schott | The static site generator and its small runtime helpers. |
| Bricolage Grotesque (Variable) 5.3 (@fontsource-variable) | SIL Open Font License 1.1 | © 2022 The Bricolage Grotesque Project Authors | Heading typeface, self-hosted. |
| Source Sans 3 (Variable) 5.3 (@fontsource-variable) | SIL Open Font License 1.1 | © Adobe (Source Sans 3 Project Authors) | Body typeface, self-hosted. |
| JetBrains Mono (Variable) 5.3 (@fontsource-variable) | SIL Open Font License 1.1 | © 2020 The JetBrains Mono Project Authors | Typeface for figures and labels, self-hosted. |
Build-time tools only
| Name | Licence | Copyright notice | Use |
|---|---|---|---|
| sharp 0.35 | Apache-2.0 | © Lovell Fuller and contributors | Image resizing at build time; not delivered to visitors. |
| @astrojs/sitemap 3.7 | MIT | © 2021 Fred K. Schott | Sitemap generation at build time. |
Thanks to Kenney
The 3D house models in example 1 come from Kenney’s “City Kit (Suburban)” pack (www.kenney.nl), released under CC0 1.0. The licence does not require credit, but we are glad to thank Kenney for making so many quality assets free to use. kenney.nl
Something missing or wrong?
If an author or rights holder finds the credit incomplete or asks for an image to be removed, write to info@hokep3d.hu; we will look into it without delay.
Curious about your own building?
Request a quote for a thermal survey – with data from your own building instead of sample images.