Laurence Jolivet

Institut national de l’information géographique et forestière | IGN

Mapping Land Use (LU) is crucial for monitoring and managing the dynamic evolution of the human activities of a given area and their consequential environmental impacts. In this study, a multimodal machine learning framework, using the XGBoost classifier applied to attributes constructed from heterogeneous spatial data sources, is defined and used...

The trajectory of a hiker can be decomposed in walking sections and pauses. The attributes and possible roles of pauses in a hike has been under-looked in studies of human mobility in nature. In mountains, pauses can have several functionalities, depending on whether they occur by choice or are imposed by the lack of people fitness walking in arduo...

Accurate land use maps, describing the territory from an anthropic utilisation point of view, are useful tools for land management and planning. To produce them, the use of optical images alone remains limited. It is therefore necessary to make use of several heterogeneous sources, each carrying complementary or contradictory information due to the...

Sensitive mapping corresponds to a process of making maps by consciously integrating personal subjectivity about a space during observation and visualization. The approach is mobilized to express emotions, sentiments and opinions associated to a spatial environment as well as a mean to be attentive to this environment based on the five senses. The...

When people are injured or lost in mountains during outdoor activities and when web-based locations are not available, they locate themselves by describing their environment, routes and activities. The description of their location is done using landmarks and spatial locations (e.g., “I am located in front of Punay Lake”, “I am near a protected are...

Cet article présente une expérimentation de cartographie sensible visant à documenter l’espace de vie tel que vécu et perçu pendant le premier confinement dû à la Covid-19. L’analyse des cartes réalisées par les participants du séminaire de cartographie sensible de l’École des hautes études en sciences sociales (EHESS) a mis en évidence des repères...

Places can be defined by different features including geographical coordinates, landscape elements and also subjective information like perception. The corpus collected by the Réseau des acteurs de l’histoire et la mémoire de l’immigration (RAHMI) contains oral interviews about Spanish Republicans journeys during Spanish Civil War and World War II....

Fauna impacts its environment as well as spatial environment influences fauna space use. Forest management implies taking into account pressure from animals in fragile-balanced patches. Our goal is to propose maps that would benefit forest planning by reflecting individual movement and space use depending on the animal species and local spatiotempo...

The first lock-down in France due to the Covid-19 pandemic happened during spring 2020. It meant restrictions for everyone regarding reachable space and possible time length outside home. The seminar of sensitive mapping taking place in École des hautes études en sciences sociales (EHESS) went online and proposed an exercise to investigate the cons...

Updating an authoritative Land Use and Land Cover (LULC) database requires many resources. Volunteered geographic information (VGI) involves citizens in the collection of data about their spatial environment. There is a growing interest in using existing VGI to update authoritative databases. This paper presents a framework aimed at integrating mul...

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. Con...

In 2008, the Network of Actors for the History and Memory of Immigration (RAHMI) launched an experimental gathering program to collect the forgotten memory of immigrant populations involved in the local community. Various groups of people were targeted by this collection, which made it possible to record life stories, including those of Spanish Rep...

This work is part of LandSense European H2020 project aiming to build a citizen platform for monitoring Land Use and Land Cover (LULC) data by integrating different types of information such as citizens-contributed data and proposing a set of services (Matheus et al., 2018). One of the pilot studies proposed in LandSense is to monitor urban dynamic...

Antique maps are full of engraved geohistorical features. They provide representations of past states of the geographical space and are favored by historians and social scientists for their uniqueness and coherence. Working on a GIS dedicated to the history of the French territory, we extracted spatial information from the Cassini Carte de France (...

Accurate and up-to-date information on land use and land cover (LULC) is needed to develop policies on reducing soil sealing through increased urbanization as well as to meet climate targets. More detailed information about building function is also required but is currently lacking. To improve these datasets, the national mapping agency of France,...

Formidable réservoir de biodiversité, les sols sont essentiels à de nombreux services écosystémiques tels que la production alimentaire ou la régulation du climat, des crues, de la qualité de l’eau ou de l’air. Face à des demandes croissantes et antagonistes en logement, zones d’activités économiques, infrastructures, nourriture, matières premières...

Traditional cartography, by its methodological and cultural foundations, allows for the creation of representations shaped by standard metrical and semiological principles. Nevertheless, expressivity is often neglected and can proved to be absent from these visual representations. Alternative portrayal of topology can be provided. Hybrid representa...

Modélisation d’un SIG, dans le cadre d’une recherche pluri-disciplinaire s’attachant au suivi des activités récréatives en milieu non-aménagé de montagne. Cette recherche combine des suivis de fréquentation humaine en milieu naturel, ainsi que de mobilités. Ces données spatio-temporelles afin d’être analysées nécessitent un référentiel robuste : un...

Customized mapping needs to rely on a strategy to help mapmakers in designing their maps. Our approach is based on analogy between existing sample maps and the wished customized map. The challenge consists in being able to offer the appropriate maps according to each mapmaker’s specifications. We have focused on the perception of seven selected vis...

Data quality assessment of different volunteered initiatives and platforms presents several challenges for data validation given the high amount of data collected. This paper focuses on two goals. The first consists in defining both a generic workflow and data quality indicators for validation of reports coming from crowd and community sourcing pla...

Dans un contexte d’étude d’interaction Homme-Faune, des traces GPS de randonneurs ont été collectées. Dans l’objectif d’appréhender une meilleure compréhension de la mobilité humaine en milieu naturel, nous analyserons finement ces données spatio-temporelles. L’algorithme de clustering spatio-temporel ST-DBSCAN est utilisé pour détecter les pauses...

Méthodologie permettant l’obtention de types d’itinéraires de randonneurs, à partir de données de GPS (IgotU GT-120) distribués lors de deux étés successifs (2014 et 2015) dans le Parc Naturel Régional du Massif des Bauges. Ces méthodes s’inscrivent à plus long terme dans la recherche d’interactions éventuelles entre touristes et ongulés sauvages.

Landscape influences fauna movement at different levels, from habitat selection to choices of movements’ direction. Our goal is to provide a development frame in order to test simulation functions for animal’s movement. We describe our approach for such simulations and we compare two types of functions to calculate trajectories. To do so, we first...

Landscape elements influence fauna movements. The information is collected so that to identify obstacles and interesting corridors: locations of animals and topographical databases describing the spatial environment. The aim of this research is to simulate fauna movement into spatial areas, both in a real context then in a context modified by infra...

Finding compromises between human development and wildlife protection is one concern of society. Taking into account animal movements in planning projects requires some knowledge on species behaviours and on what determines their localizations and their habitat places. Our goal is to be able to represent animal movements on an accurate geographical...

Une des préoccupations de la société est de trouver un compromis entre le développement des territoires et la protection de la faune sauvage. La prise en compte des déplacements des animaux lors de projets d’aménagement nécessite de connaître les comportements des différentes espèces et de définir ce qui a une influence sur leur localisation et sur...

http://www.iale2013.eu/assessing-effect-landscape-change-fauna-agent-based-model-simulation

La réalisation d'une légende de carte topographique est un processus qui fait appel à de nombreux domaines de connaissances. L'objectif du travail présenté est de permettre à des utilisateurs de créer des cartes sur mesure, en particulier de les aider à concevoir des légendes cartographiquement correctes et adaptées à leurs goûts et à leurs besoins...

Map design includes dealing with several requirements, and it becomes quite complicated when there are many data to manage, and many constraints to consider. Precise demands may concern various characteristics like the dimensions, the scale, the data to display, or the symbolisation. Though, the cartographic process has been simplified. More and mo...

This paper addresses the issue of designing efficient on-demand maps in services oriented architectures. Some crucial steps of an on-demand map design process are not supported by today’s architectures and may greatly benefit from knowledge that has been formalised by cartographers, like the definition of styles to draw geographical data on the map...

Most studies of anopheline mosquito larval ecology have been done in rural settings. However, latest data based on two cross-sectional surveys in Antananarivo, the capitol of Madagascar, shown low rate of malaria cases among febrile episodes but autochthonous malaria cases exist. Anopheles funestus constitutes the main vector of malaria in the high...

Antananarivo, the capital of Madagascar, is located at an altitude of over 1,200 m. The environment at this altitude is not particularly favourable to malaria transmission, but malaria nonetheless remains a major public health problem. The aim of this study was to evaluate exposure to malaria in the urban population of Antananarivo, by measuring th...