Geographic Information Sciences Commons^™

Development Of A Qgis Plugin To Dasymetric Mapping, Nelson Mileu, Margarida Queirós

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Demographic data is usually represented by choropleth map, where the statistical data is aggregated to areal units. This type of representation has several limitations associated with spatial analysis and distribution. A common alternative to display statistical data in meaningful spatial zones is the dasymetric mapping technique. Though dasymetric mapping has existed for many decades, the open source GIS tools to explore dasymetric mapping methods are scarce. In this paper, a Geographical Information System (GIS) open source application was developed in QGIS software that applies the dasymetric mapping method to the Portuguese Guimarães municipality 2011 Census block-group populations and using Corine …

Crowdsourcing The Georeferencing Of Historical Pictures, Timothée Produit, Nicolas Blanc, Sarah Composto, Jens Ingensand, Loic Furhoff

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Countless organizations own archive pictures which are not used due to the difficulty of localizing them. Only the participation of volunteers can help to identify the image content. Through an accessible web interface called smapshot, citizens are able to georeference historical images without any prior specific competence. To avoid the volunteers to face the complexity of 3D digitization and navigation, we implemented a state of the art photogrammetry camera orientation algorithm in the platform. Currently several thousand images from all around Switzerland have been georeferenced by the crowd. At this time the tool is mainly used by the population for …

Hydraulic Modeling For The Assessment Of Flood Hazard Using The Iber Software In The Amarante Urban Center, Márcia Martins, Alberto Gomes, Pedro Pinto Santos

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Recently, there is an availability increase of hydraulic modeling software that allows the analysis and definition of several hydraulic variables, namely water depth and flow velocity, which are important parameters for the assessment and management of flood-prone areas. The growing use of this software is related with the fact of being Free and Open Source Software (FOSS), making possible the understanding of different approaches and providing most reliable and accurate results of flood-prone areas according different return periods.

In this study it was used the freely hydraulic software Iber, a tool for two-dimensional modeling of water flow in rivers and …

Grassland Recognition With The Usage Of Thermal Weights, Alen Mangafić, Nika Mesner, Mihaela Triglav Čekada

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

In this paper we apply the usage of thermal weights, a new variable for geostatistical analysis and we present the method for their determination. In the case study we tested a data fusion between Sentinel-2 and Landsat 7/8 data, to incorporate also the thermal factor in the detection of land cover changes. The process distinguishes grasslands from other crops with similar vegetative appearance and offers us the possibility to create a new statistical sample with just grasslands. The data fusion is incorporated in the calculation of Land Surface Temperature (LST^FU) by combining the Sentinel-2 derived Normalized Difference Vegetation …

Robust Railroad Cable Detection In Rural Areas From Mls Point Clouds, Máté Cserép, Péter Hudoba, Zoltán Vincellér

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Monitoring of the railroad infrastructure is crucial for safety concerns and accident prevention. This task requires regular surveillance which is nowadays still carried out by expensive and time consuming manual visual inspections in many countries. The problem of railroad cable recognition (contact cables, catenary cables, return current cables) in rural areas based on LiDAR point clouds has it own methods, but current state of the art solutions suffer from extremely high computational load due the extensive size of the datasets. In this study we analyzed and compared novel robust solutions focusing on minimizing the assumptions (positions and distances of track …

Foss4g 2016 Proceedings: Academic Program - Selected Papers And Posters, Franz-Josef Behr

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

This Conference Proceedings is a collection of selected papers and posters submitted to the Academic Program of the International Conference for Free and Open Source Software for Geospatial (FOSS4G 2016), 24th to 26th August 2016 in Bonn, Germany.

Like in previous FOSS4G conferences on national and international level the academic papers and posters cover an extensive wide range of topics reflecting the contribution of the academia to this field by the development of open source software components, in the design of open standards, in the proliferation of web-based solutions, in the dissemination of the open principles important in science and …

Volume Introduction Letter, Franz-Josef Behr

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

This Conference Proceedings is a collection of selected papers and posters submitted to the Academic Program of the International Conference for Free and Open Source Software for Geospatial (FOSS4G 2016), 24th to 26th August 2016 in Bonn, Germany. Again geospatial open source software was the focus of a well-attended international conference flanked by presentations on open standards and the open data movement, a meeting place for open communities.

Grass In The Desert? Developing Foss Tools For Monitoring Desertification, Anna Zanchetta

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

The use of Change Vector Analysis (CVA) combined with the Tasselled Cap tranform (TCT) is a powerful remote sensing tool to monitor forests and vegetated areas, but its application to arid and semiarid environment is not straightforward.

This question is tackled through the calculation of a new set of TCT coefficients using R and GRASS-GIS for SPOT and Landsat satellites, then applied and tested in change detection analysis on a short (seasonal) and a long (decades) temporal scale.

Results show that the combined procedure is an effective method to detect changes in desert environment. Furthermore, the new TCT allows the …

Development Of Environment Spatial Information Service Utilizing Mobile Location-Based Technology, Jeongho Yoon

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Rapid implementation of mobile devices and significant development of communication technology lead diverse changes over the society at large. Especially, Location-Based Technology of mobile devices is recognized as an important tool to improve task efficiency of tasks that requires on-site investigation and management. The research develops the way to improve environmental administrative work by utilizing Location-Based Technology of mobile devices and environmental geographic information towards tasks for both instruction and inspection of environmental pollutant discharge industries. In addition, it defines function and improvement direction of environment monitoring tasks via test bed implementation to developed mobile application and spatial information database.

The Construction Of Open Data Portal Using Dkan For Integrate To Multiple Japanese Local Government Open Data, Toshikazu Seto, Yoshihide Sekimoto

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

In recent years, the Code for Japan, a civic tech community in Japan, has focused on the context of the FOSS4G. Consequently, the Japanese have published open data in more than 150 local governments, but these data are almost simply provided as a file on their website. And also CKAN portal are used less than 20 cities. In this study, we built open data platform that uses DKAN for integrated open data distribution of Japanese local governments.

Modelling Concrete And Abstract Geoprocessing Workflows With Ilwis 4, Rob Lemmens

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

A workflow represents a combination of process steps to be handled by computers or humans. Geoprocessing workflows consist of geodata (satellite images, in-situ sensor data, human sensor data) and the operations needed for their storage, analysis and presentation. In this research we develop methods for creating and sharing geo-workflows between humans and computers to support knowledge sharing and system interoperability.

Gis.Lab: Hydrological Modeling On The Web, Martin Landa

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

GIS.lab (http://web.gislab.io) connects open source technologies together: QGIS is used as desktop environment as well as the server for data serving. A web client is based on OpenLayers and AngularJS libraries. On the server side, thin Django application is developed as well. Beside a core functionality like responsive web design, support for topics, base and overlay layers, legend, identification, attribute table data filtering, measurement, and print, which are mainly based on QGIS server, serving the data via OGC WMS and WFS, the GIS.lab infrastructure can provided support for additional functionality implemented as so-called plugins.

This contribution is focused on the …

Classification Of Land Use/Cover Change In The Kanto Region, Japan Using Foss4g And Open Data, Nobusuke Iwasaki, David Spraguea, Ayaka Onohara

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

In this study, we classified land use/cover change from the 1880’s to 2010’s in the Kanto Region, Japan. First, we developed a 100m grid land use/cover database of the 1880’s with QGIS application and PostGIS database. The data were published through the GitHub Site as an Open Data (CC BY 4.0).

We imported Japanese national Open Data about land use (1970’s and 2010’s) to the PostGIS database, and carried out a spatial join with land use/cover data of the 1880’s. A model-based clustering method was applied to the land use/cover change data that were summarized based on a 1 km …

Shapefile Projection Finder, Manfred Egger

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

A new way to find and define the coordinate system of GIS data automatically is presented. This tool is for people without special knowledge of coordinate systems, who want to integrate GIS data with unknown projection to their GIS project.

From Global Observations To Local Information: The Earth Observation Monitor, Jonas Eberle

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Earth Observation (EO) data are available around the globe and can be used for a range of applications. To support scientists and local stakeholders in the usage of information from space, barriers, especially in data processing, need to be reduced. To meet this need, the software framework "Earth Observation Monitor" provides access and analysis tools for global EO vegetation time-series data based on standard-compliant geo-processing services. Data are automatically downloaded from several data providers, processed, and time-series analysis tools for vegetation analyses extract further information. A web portal and a mobile application have been developed to show the usage of …

Semantic Markup For Geographic Web Maps In Html, Malte Reißig

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

In the recent years more and more geographical web maps have been developed and published on the Open Web Platform. Technically this has turned all variants of these maps into documents of the Hypertext Markup Language (HTML) making them appear to us naturally as graph-like and semi-structured data. In this dispute with geographical web maps and HTML we draw on the notion of so called “map mashups”. Requiring an alternative model and definition of what such a map is, our research allows us to build and refine supportive technology which helps us in analyzing and interpreting information map makers code …

Is There Life In Virtual Globes?, Konstantinos Evangelidis, Theofilos Papadopoulos

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Virtual globes have been widely used during last decade mainly for simulating observations of the earth from the outer space and navigation experiences over its surface which may be portrayed with various types of views and textures. The present work aims to extend virtual globe capabilities by incorporating three dimensional events on them. Such events may include animation and motion effects on 3D models representing real world living or inanimate spatial objects, modeling of natural resources and phenomena representations and any type of geovisualized activities and demonstrations.

Osgeo Conference Videos As A Resource For Scientific Research: The Tib|Av Portal, Peter Lemmens, Margret Plank, Angelina Kraft, Britta Dreyer

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

This paper reports on new opportunities for research and education in Free and Open Source Geoinformatics as a translational part of Open Science, enabled by a growing collection of OSGeo conference video recordings at the German National Library of Science and Technology (TIB). Since 2015, OSGeo conference recordings have been included to the collection sphere of TIB in information sciences. Currently, video content from selected national (FOSSGIS), regional (FOSS4G-NA) and global (FOSS4G) conferences is being actively collected. The annual growth exceeds 100 hours of new content relating to the OSGeo software projects and the OSGeo scientific-technical communities. This is seconded …

Mapping Wifi Measurements On Openstreetmap Data For Wireless Street Coverage Analysis, Andrea Valenzano, Dario Mana, Claudio Borean, Antonio Servetti

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

The growing interest on smart cities and the deployment of an ever increasing number of smart objects in public locations, such as dumpsters, traffic lights, and manholes, requires ubiquitous connectivity for these devices to communicate data and to receive configurations. Opportunistic WiFi connectivity is a valid alternative both to ad hoc solutions, like LoRa, which require costly deployments, and to communicating through the mobile network, which is both pricey and battery power hungry. In this paper we present a tool to analyze the WiFi coverage of home Access Points (AP) on the city streets. It can be of interest to …

Involving Communities In Environmental Protection By Community Information Systems: The Case Study Of “La Cuicadora”, Domenico Vito

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

The involvement of the communities is a key-strategy to enable fast responses both case of emergency and environmental protection.

On this goal geospatial system could allow to collect information directly from the citizens. More specifically they can act on “feedback-loops” between “communities”, “decision-makers” and “environment” catalysing participation and the perception of local knowledge. The work will present the case study of “la Cuicadora” project, a Ushaidi based crowdmapping system provides an information sharing network to assist Peruvian indigenous communities in better protecting themselves from contaminated water sources.

The analysis offers the chance to understand the concept of Community Information Systems …

Building Applications With Foss4g Bricks: Two Examples Of The Use Of Grass Gis Modules As A High-Level “Language” For The Analyses Of Continuous Space Data In Economic Geography, Moritz Lennert

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

In a world where researchers are more and more confronted to large sets of micro- data, new algorithms are constantly developed that have to be translated into usable programs. Modular GIS toolkits such as GRASS GIS offer a middle way between low-level programming approaches and GUI-based desktop GIS. The modules can be seen as elements of a programming language which makes the implementation of algorithms for spatial analysis very easy for researchers. Using two examples of algorithms in economic geography, for estimating regional exports and for determining raster-object neighbourhood matrices, this paper shows how just a few module calls can …

Analysing The Practical Feasibility Of Fossgis In Military Operations – A Cholera Outbreak Use Case, Susanna Jacoba Henrico, Serena Coetzee, Antony Cooper

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Remaining ahead of the enemy in all circumstances is crucial to any military power. Geographic information systems (GIS) can provide the military commander with geospatial information about the theatre of war to assist with the planning and execution of a mission. Unfortunately, technology usually comes at a price. GIS is no exception. The cost of acquiring and maintaining GIS software licenses, as well as training staff in the use of the software, needs to be considered. The question arises whether open source software, which can be used without any software license expenses, is a feasible alternative in military operations. The …

Identification Of Sar Detected Targets On Sea In Near Real Time Applications For Maritime Surveillance, Sergey Voinov, Egbert Schwarz, Detmar Krause, Matthias Berg

Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings

Remote sensing technologies are widely used in maritime surveillance applications. Nowadays, spaceborne Synthetic Aperture Radar (SAR) systems provide outstanding capabilities for target detection at sea for large areas independently from the weather conditions. The generated value added target detection product is composed by complementary information from the Automatic Identification System (AIS). Resulting information layers provides a more reliable picture on the maritime situation awareness. This paper describes the approach of SAR-AIS data fusion and its visualization means developed for Near Real Time (NRT) Applications for Maritime Situational Awareness by the Maritime Security Lab at the Ground Station in Neustrelitz, part …