[article] | Titre : |
Use of automated change detection and VGI sources for identifying and validating urban land use change |
| Type de document : |
Article/Communication |
| Auteurs : |
Ana-Maria Olteanu-Raimond  , Auteur ; L. See, Auteur ; M. Schultz, Auteur ; Giles M. Foody, Auteur ; M. Riffler, Auteur ; T. Gasber, Auteur ; Laurence Jolivet , Auteur ; Arnaud Le Bris , Auteur ; Yann Méneroux , Auteur ; Lanfa Liu, Auteur ; Marc Poupée, Auteur ; Marie Gombert, Auteur |
| Année de publication : |
2020 |
| Projets : | Landsense / Raimond, Ana-Maria | | Note générale : |
Bibliographie |
| Langues : |
Anglais (eng) |
| Descripteur : |
[Vedettes matières IGN] Géomatique web
[Termes descripteurs IGN] carte d'utilisation du sol
[Termes descripteurs IGN] cartographie collaborative
[Termes descripteurs IGN] changement d'utilisation du sol
[Termes descripteurs IGN] détection automatique
[Termes descripteurs IGN] détection de changement
[Termes descripteurs IGN] données localisées des bénévoles
[Termes descripteurs IGN] estimation de précision
[Termes descripteurs IGN] science citoyenne
[Termes descripteurs IGN] zone urbaine
|
| Résumé : |
(Auteur) Land use and land cover (LULC) mapping is often undertaken by national mapping agencies, where these LULC products are used for different types of monitoring and reporting applications. Updating of LULC databases is often done on a multi-year cycle due to the high costs involved, so changes are only detected when mapping exercises are repeated. Consequently, the information on LULC can quickly become outdated and hence may be incorrect in some areas. In the current era of big data and Earth observation, change detection algorithms can be used to identify changes in urban areas, which can then be used to automatically update LULC databases on a more continuous basis. However, the change detection algorithm must be validated before the changes can be committed to authoritative databases such as those produced by national mapping agencies. This paper outlines a change detection algorithm for identifying construction sites, which represent ongoing changes in LU, developed in the framework of the LandSense project. We then use volunteered geographic information (VGI) captured through the use of mapathons from a range of different groups of contributors to validate these changes. In total, 105 contributors were involved in the mapathons, producing a total of 2778 observations. The 105 contributors were grouped according to six different user-profiles and were analyzed to understand the impact of the experience of the users on the accuracy assessment. Overall, the results show that the change detection algorithm is able to identify changes in residential land use to an adequate level of accuracy (85%) but changes in infrastructure and industrial sites had lower accuracies (57% and 75 %, respectively), requiring further improvements. In terms of user profiles, the experts in LULC from local authorities, researchers in LULC at the French national mapping agency (IGN), and first-year students with a basic knowledge of geographic information systems had the highest overall accuracies (86.2%, 93.2%, and 85.2%, respectively). Differences in how the users approach the task also emerged, e.g., local authorities used knowledge and context to try to identify types of change while those with no knowledge of LULC (i.e., normal citizens) were quicker to choose ‘Unknown’ when the visual interpretation of a class was more difficult. |
| Numéro de notice : |
A2020-243 |
| Thématique : |
GEOMATIQUE |
| Nature : |
Article |
| nature-HAL : |
ArtAvecCL-RevueIntern |
| DOI : |
10.3390/rs12071186 |
| date de publication en ligne : |
07/04/2020 |
| En ligne : |
https://doi.org/10.3390/rs12071186 |
| Format de la ressource électronique : |
URL Article |
| Permalink : |
https://documentation.ensg.eu/index.php?lvl=notice_display&id=95217 |
in Remote sensing > vol 12 n° 7 (April 2020)
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