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A redesign of OGC Symbology Encoding standard for sharing cartography

Erwan Bocher, Olivier Ertz
2018 PeerJ Computer Science  
, 2007; 276 Schnabel and Hurni, 2007; Mays, 2012; Iosifescu-Enescu et al., 2010; Bocher et al., 2011; Rita et al., 277 2012; Bocher and Ertz, 2015).  ...  Several users contribute to the creation of a common map, each user having specialized 140 skills to complement one another so as to tell stories as maps, each using her(his) own software 141 (Ertz et  ... 
doi:10.7717/peerj-cs.143 pmid:33816799 pmcid:PMC7924489 fatcat:hpg452dd6faybnwgda5vjunzsm

La base de données « Charges critiques » Gestion et acquisition des données

Anne Probst, Jean-Paul Party, Olivier Ertz
2002 Pollution Atmosphérique  
NDLR : Article issu du Séminai re ADEM E « Pollution atmosphérique et charges critiques: Bilan et perspectives des recherches menées en France " , 15 mai 2001, Paris (MATE). Résumé Dans le but d'assurer une mei lleure gestion et une meilleure diffusion des données concernant les charges critiques acides et azotées pour le territoire français, après une étude de faisabilité, une première application de système de gestion de base de données a été proposée. Dans un deuxième temps, une phase
more » ... tion de la base (BDCC) a été menée à bien. Son développement a été assuré à partir de la première structure dite de niveau 1 à l'aide du SGBDR Oracle 7.3 pour Windows NT. D'autre part, outre l'extension de la base, un développement déterminant a permis le couplage entre la base de données BDCC et un système d'information géographique (Map Info 4.5). Dans ce travail, les possibilités de développement d'Oracle ont permis d'apporter des modifications à la structu re définie initialement et d'étendre la possibilité de la basepar ajout de nouvelles tables d'une part, et par ajout de nouvelles fonctions statistiques indispensables à l'exploitation des données de la base, d'autre part. L'évolution de la base permet en outre de pouvoirimporter et exporter par une procédure conviviale les fichiers sous format Excel. Une mise en sécurité des données de la base a été réalisée. Dans chaque cas, il s'agissait de rendre plus efficace le traitement, la gestion et l'acquisition des nouvelles données au sein du système. Ainsi, contrainte par les besoins au niveau européen et par le développement informatique de la base, la nouvelle structuration des tables et ses avantages dansla gestion des données sont présentées. Enfin, le développement du couplage entre la base de données et le SIG est illustré par un exemple d'application de liaison entre les données de la base et des cartes existantes de valeurs seuils importées à partir d'un autre SIG (Arc-Info). Les possibilités de croisement de données existantes et d'importation de cartes sont nombreuses. Abstract A first application of a data base management system was improved in order to ensure a better management of the critical loads data for France. The development was ensured starting from the first structure known as of level 1 using the RDBMS Oracle 7.3 for Windows NT. In addition to the extension of the base, the link between the data base BDCC and a GIS (Map Info4.5) has been performed . In this work, the possibilities of Oracle all owed to modify theinitiallydefined structure and to extend the base by addition of new tables on one hand, and by addition of new statistical functions essential to the exploitation of the data of the base, on the other hand. The evolution of the database allows to import and export by a user-friendly procedure the files under Excel format. A setting in data security of the base was carried out. In each case, it was a question of making the treatment, the management and the acquisition of the new data within the system more effective.
doi:10.4267/pollution-atmospherique.2294 fatcat:ti3sclsg4ja7nmvivkyrgeaw2m

The open source dynamics in geospatial research and education

Olivier Ertz, Sergio J Rey, Stéphane Joost
2014 Journal of Spatial Information Science  
doi:10.5311/josis.2014.8.182 fatcat:bxxs42yizng6pl22m4qluzet4y

Implementation of Tiled Vector Services: A Case Study

Jens Ingensand, Marion Nappez, Cédric Moullet, Loïc Gasser, Olivier Ertz, Sarah Composto
2016 International Conference Geographic Information Science  
Vector tiling aims at cutting vector data into smaller entities. It offers several opportunities, especially for the development of web-mapping systems, such as the possibilities to apply different styles, to access attributes or to render 3D data. Today no open and widely adopted standard exists for the implementation of web services involving vector tiles. In this paper we investigate several important parameters that need to be considered for the implementation of vector tile services. We
more » ... n present a case-study where several tiled vector services are implemented. The results of this case study are useful for further implementations of tiled vector services and discussions regarding standardization.
dblp:conf/giscience/IngensandNMGEC16 fatcat:vqhb3emz3rbkzmtqukglnp2wv4

Relationship between land cover type and Body Mass Index in Geneva

Estelle Rochat, Solange Duruz, Ivo Widmer, Alain Clemence, Olivier Desrichard, Daniel Rappo, Olivier Ertz, Jens Ingensand, Jean-Marc Theler, Idris Guessous, Stephane Joost
2015 2015 Joint Urban Remote Sensing Event (JURSE)  
Past studies conducted in urban areas analyzed the impact of the presence of green spaces on public health, and highlighted in particular the psychological benefits of interacting with nature. To investigate a supposed relationship between overweight and dense built environment, we focused on the State of Geneva, Switzerland, and calculated the correlation between Body Mass Index (BMI) in a representative sample of 6663 adults and the percentage of natural areas at the locations where these
more » ... viduals were living. To this end, we used populationbased health data from the "Bus Santé" study (Geneva University Hospitals) and multi-scale land cover maps obtained by means of satellite images and LiDAR data classification. We found little correlation between BMI (as a proxy for health) and land cover data and were not able to verify the working hypothesis at local and regional scales. However, an important phenomenon highlighted here is the difference in the results obtained between the city center and the whole State.
doi:10.1109/jurse.2015.7120542 dblp:conf/jurse/RochatDWCDREITG15 fatcat:yk72nodw5jge5jiu7rl7rwvl64

Auto-filtering validation in citizen science biodiversity monitoring: a case study

Maryam Lotfian, Jens Ingensand, Olivier Ertz, Simon Oulevay, Thibaud Chassin
2019 Proceedings of the ICA  
<p><strong>Abstract.</strong> Data quality is the primary concern for researchers working on citizen science projects. The collected data by citizen science participants are heterogeneous and therefore must be validated. There are several validation approaches depending on the theme and objective of the citizen science project, but the most common approach is the expert review. While expert validation is essential in citizen science projects, considering it as the only validation approach can
more » ... very difficult and complicated for the experts. In addition, volunteers can get demotivated to contribute if they do not receive any feedback regarding their submissions. This project aims at introducing an automatic filtering mechanism for a biodiversity citizen science project. The goals of this project are to first use an available historical database of the local species to filter out the unusual ones, and second to use machine learning and image recognition techniques to verify if the observation image corresponds with the right species type. The submissions that does not successfully pass the automatic filtering will be flagged as unusual and goes through expert review. The objective is on the one hand to simplify validation task by the experts, and on the other hand to increase participants' motivation by giving them real-time feedback on their submissions. Finally, the flagged observations will be classified as valid, valid but uncommon, and invalid, and the observation outliers (rare species) can be identified for each specific region.</p>
doi:10.5194/ica-proc-2-78-2019 fatcat:wi45firzh5dj3h24uvjquljbee

Challenges in creating a 3D participatory platform for urban development

Thibaud Chassin, Jens Ingensand, Maryam Lotfian, Olivier Ertz, Florent Joerin
2019 Advances in Cartography and GIScience of the International Cartographic Association  
<p><strong>Abstract.</strong> This paper aims at underling difficulties regarding the establishment of citizen engagement processes. The specificity of citizen engagement processes lies in their evolution over time where objectives, constraints, and latitudes of a given project influence the relevance of the tools offered to citizens. Three categories of urban projects (trans-urban, major metropolitan, architectural design) have been described. These classes range from a local space with short
more » ... eadlines to a regional space spread over several decades. Furthermore, the use of 3D platforms for a broad public is influenced by the users' preferences, perception, and expertise. Throughout this study, major challenges that have been experienced during the design a 3D participatory platform are identified. They range from the issues of implementing adequate tools according to the project (temporal and spatial scalability), the participation forms (passive, consultative or interactive), to the difficulties of convincing the authorities to use new bottom-up methods. Finally, a conceptual framework for the creation of a 3D participatory platform has been introduced. It can be summarized by three major steps: (1) Meeting the needs of a decision maker, (2) Designing the participation tool in accordance with the context, (3) Translating collected raw data in order to respond to the initial request.</p>
doi:10.5194/ica-adv-1-3-2019 fatcat:5a4peuzlxjhqdbusnuwuw5pz6i

Switchable reflector in the Panamanian tortoise beetleCharidotella egregia(Chrysomelidae: Cassidinae)

Jean Pol Vigneron, Jacques M. Pasteels, Donald M. Windsor, Zofia Vértesy, Marie Rassart, Thomas Seldrum, Jacques Dumont, Olivier Deparis, Virginie Lousse, László P. Biró, Damien Ertz, Victoria Welch
2007 Physical Review E  
The tortoise beetle Charidotella egregia is able to modify the structural color of its cuticle reversibly, when disturbed by stressful external events. After field observations, measurements of the optical properties in the two main stable color states and scanning electron microscope and transmission electron microscope investigations, a physical mechanism is proposed to explain the color switching of this insect. It is shown that the gold coloration displayed by animals at rest arises from a
more » ... hirped multilayer reflector maintained in a perfect coherent state by the presence of humidity in the porous patches within each layer, while the red color displayed by disturbed animals results from the destruction of this reflector by the expulsion of the liquid from the porous patches, turning the multilayer into a translucent slab that leaves an unobstructed view of the deeper-lying, pigmented red substrate. This mechanism not only explains the change of hue but also the change of scattering mode from specular to diffuse. Quantitative modeling is developed in support of this analysis.
doi:10.1103/physreve.76.031907 pmid:17930271 fatcat:346xrihba5cffkccetuxs5wh7e

Towards a new classification of the Arthoniales (Ascomycota) based on a three-gene phylogeny focussing on the genus Opegrapha

Damien Ertz, Jolanta Miadlikowska, François Lutzoni, Steven Dessein, Olivier Raspé, Nathalie Vigneron, Valérie Hofstetter, Paul Diederich
2009 Mycological Research  
Ertz 10027 (BR Table 1 : 1 samples Enterographa crassa Ertz 7554, 7561, 7621; E. hutchinsiae Ertz 10064, and Opegrapha zonata Ertz 9230).  ...  Ertz 8730 (BR) Bark - EU704046 EU704009 þ A. didyma Belgium, D. Ertz 7587 (BR) Bark EU704083 EU704047 EU704010 þ A. radiata Belgium, D. Ertz s. n.  ... 
doi:10.1016/j.mycres.2008.09.002 pmid:18929650 fatcat:dzzz2gijebb4bp2n2twepcra5a

Building a Crowdsourcing based Disabled Pedestrian Level of Service routing application using Computer Vision and Machine Learning

Nicolas Blanc, Zhan Liu, Olivier Ertz, Diego Rojas, Romain Sandoz, Maria Sokhn, Jens Ingensand, Jean-Christophe Loubier
2019 2019 16th IEEE Annual Consumer Communications & Networking Conference (CCNC)  
The availability of global and scalable tools to assess disabled pedestrian level of service (DPLoS) is a real need, yet still a challenge in today's world. This is due to the lack of tools that can ease the measurement of a level of service adapted to disabled people, and also to the limitation concerns about the availability of information regarding the existing level of service, especially in real time. This paper describes preliminary results to progress on those needs. It also includes a
more » ... sign for a navigation tool that can help a disabled person move around a city by suggesting the most adapted routes according to the person's disabilities. The main topics are how to use advanced computer vision technologies, and how to benefit from the prevalence of handheld devices. Our approach intends to show how crowdsourcing techniques can improve data quality by gathering and combining up-to-date data with valuable field observations.
doi:10.1109/ccnc.2019.8651850 dblp:conf/ccnc/BlancLERSSIL19 fatcat:flaxht5shvh3jdgzfcua7ljigy

GEOPOLL - Integrate Cartographic Questions in Web Forms, Polls or Surveys

Bigler, Adrien; Ertz, Olivier; Rappo, Daniel; Composto, Sarah; Joerin, Florent; Risse, Maude Luggen
2017
As a public funded research institute, the release of such a library would be done following the vision of Ertz et al. 2014 .  ...  As a research institute attached to a public university, we tend to favor open source technologies for the advantages they offer both in terms of education and applied research (Ertz et al. 2014) .  ... 
doi:10.7275/r5k935qj fatcat:kzjct62bbrhlrgjv4txloandli

Lichenicolous fungi of Ukraine: an annotated checklist

VV Darmostuk
2017 Studies in Fungi  
D. epiphyscia Ertz & Diederich (=Phoma epiphyscia Vouaux, P. physciicola Keissl.)on Physcia adscendens. E: Khe )  ...  Hoffm. & Hafellner (=Guignardia olivieri (Vouaux) Olivier)on Xanthoria parietina. B: I (Navrotskaya et al. 1996, Kondratyuk 2012), Zak (Kondratyuk et al. 2003); E: Khe (Navrotskaya et al. 1996).  ... 
doi:10.5943/sif/2/1/16 fatcat:qivgqfukircvrm5xonxlyurxjq

First checklist of lichens and lichenicolous fungi from Mauritius, with phylogenetic analyses and description of new taxa

Paul Diederich, Damien Ertz
2020 Plant and Fungal Systematics  
Olivier Plaines Wilhems: Le Pétrin, heathland NW of Pétrin Infor- mation Centre, terricolous, 2016, Diederich 18607 & Ertz 23329 (TLC of 23329: thamnolic, solvents A, B'). ). macilenta Hoffm.  ...  (Ertz et al. 2018a) .  ... 
doi:10.35535/pfsyst-2020-0003 fatcat:5lxnv7ar3ne7dixxwmgtmkxmu4

A new genus, Zhurbenkoa, and a novel nutritional mode revealed in the family Malmideaceae (Lecanoromycetes, Ascomycota)

Adam Flakus, Javier Etayo, Sergio Pérez-Ortega, Martin Kukwa, Zdeněk Palice, Pamela Rodriguez-Flakus
2019 Mycologia  
et al. 2014; Ertz et al. 2015; Muggia et al. 2016) , and Trypetheliales (Ertz et al. 2015) .  ...  Olivier, Bull Acad Int Géo Bot 15:275. 1905. ≡ Scutula epicladonia (Nyl.) Zopf, Syll Fung 18:175. 1906.  ... 
doi:10.1080/00275514.2019.1603500 fatcat:wgiskwlcyfhjpipczampbbcz6m

STUDY OF THE LICHENS OF THE MOROCCAN ATLANTIC COAST SAFI-ESSAOUIRA: BIOINDICATION OF AIR QUALITY AND LIMITING FACTORS

M ESSILMI, M LOUDIKI, A EL GHARMALI
2019 Applied Ecology and Environmental Research  
Ertz & Diederich + + + + + + + + Physcia adscendens (Fr.) H. Olivier + + + + Alyxoria subelevata (Nyl.) Ertz & Tehler + + + + + + + Caloplaca subochracea (Wedd.)  ...  Körb. 1 1 Alyxoria variiformis (Anzi) Ertz 1 1 Alyxoria subelevata (Nyl.) Ertz & Tehler 1-2 1-3 Arthonia calcarea (Sm.) Ertz & Diederich 1-2 1-3 Aspicilia calcarea (L.)  ... 
doi:10.15666/aeer/1702_43054323 fatcat:42xn5flvcbag7hmcysifu7gbm4
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