scholarly journals AwaP-IC—An Open-Source GIS Tool for Measuring Walkable Access

Urban Science ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 48 ◽  
Author(s):  
Ivan Majic ◽  
Elek Pafka
Keyword(s):  
Open Source ◽  
Urban Form ◽  
Weighted Average ◽  
Walking Distance ◽  
Private Land ◽  
Public And Private ◽  
Morphological Studies ◽  
Cadastral Maps ◽  
Gis Tools ◽  
Open Source Gis

Within the broad field of walkability research, a key area of focus has been the relationship between urban form and capacities for walking. Measures of walkable access can be grouped into two key types: permeability measures that quantify the ease of movement through an urban fabric, and catchment measures, quantifying the potential to reach destinations within walking distance. Of numerous street network measures in use, it has been shown that many are poor proxies of permeability and catchment. Instead, two new measures have been proposed: the area-weighted average perimeter (AwaP) and interface catchment (IC), that, combined, better capture the capacities of urban morphologies to enable and attract pedestrian movement. In this paper, we present the QGIS tool AwaP-IC, developed to overcome the difficulty of computing these measures. Unlike GIS tools based on models that abstract streets to axial lines, by employing new algorithms and spatial computation techniques, AwaP-IC analyses actual urban morphologies, based on cadastral maps delineating public and private land. This can empower a new stream of urban morphological studies with the computational power of GIS. As an open-source tool, it can be further developed for use in urban mapping and to streamline the analysis of large datasets.

scholarly journals OPEN SOURCE APPROACH TO URBAN GROWTH SIMULATION

2016 ◽  
Vol XLI-B7 ◽  
pp. 953-959 ◽  
Author(s):  
A. Petrasova ◽  
V. Petras ◽  
D. Van Berkel ◽  
B. A. Harmon ◽  
H. Mitasova ◽  
...  
Keyword(s):  
Open Source ◽  
Urban Growth ◽  
Model Development ◽  
Modeling Framework ◽  
Regional Environment ◽  
Ongoing Research ◽  
Grass Gis ◽  
Gis Tools ◽  
Open Source Gis

Spatial patterns of land use change due to urbanization and its impact on the landscape are the subject of ongoing research. Urban growth scenario simulation is a powerful tool for exploring these impacts and empowering planners to make informed decisions. We present FUTURES (FUTure Urban – Regional Environment Simulation) – a patch-based, stochastic, multi-level land change modeling framework as a case showing how what was once a closed and inaccessible model benefited from integration with open source GIS.We will describe our motivation for releasing this project as open source and the advantages of integrating it with GRASS GIS, a free, libre and open source GIS and research platform for the geospatial domain. GRASS GIS provides efficient libraries for FUTURES model development as well as standard GIS tools and graphical user interface for model users. Releasing FUTURES as a GRASS GIS add-on simplifies the distribution of FUTURES across all main operating systems and ensures the maintainability of our project in the future. We will describe FUTURES integration into GRASS GIS and demonstrate its usage on a case study in Asheville, North Carolina. The developed dataset and tutorial for this case study enable researchers to experiment with the model, explore its potential or even modify the model for their applications.

Open Source GIS Tools: Two Environmental Applications

2018 ◽  
pp. 102-123
Author(s):  
Lia Barbara Cunha Barata Duarte ◽  
Jose Alberto Alvares Pereira Goncalves ◽  
Ana Claudia Teodoro
Keyword(s):  
Open Source ◽  
Environmental Applications ◽  
Gis Tools ◽  
Open Source Gis

scholarly journals OPEN SOURCE APPROACH TO URBAN GROWTH SIMULATION

2016 ◽  
Vol XLI-B7 ◽  
pp. 953-959
Author(s):  
A. Petrasova ◽  
V. Petras ◽  
D. Van Berkel ◽  
B. A. Harmon ◽  
H. Mitasova ◽  
...  
Keyword(s):  
Open Source ◽  
Urban Growth ◽  
Model Development ◽  
Modeling Framework ◽  
Regional Environment ◽  
Ongoing Research ◽  
Grass Gis ◽  
Gis Tools ◽  
Open Source Gis

Spatial patterns of land use change due to urbanization and its impact on the landscape are the subject of ongoing research. Urban growth scenario simulation is a powerful tool for exploring these impacts and empowering planners to make informed decisions. We present FUTURES (FUTure Urban – Regional Environment Simulation) – a patch-based, stochastic, multi-level land change modeling framework as a case showing how what was once a closed and inaccessible model benefited from integration with open source GIS.We will describe our motivation for releasing this project as open source and the advantages of integrating it with GRASS GIS, a free, libre and open source GIS and research platform for the geospatial domain. GRASS GIS provides efficient libraries for FUTURES model development as well as standard GIS tools and graphical user interface for model users. Releasing FUTURES as a GRASS GIS add-on simplifies the distribution of FUTURES across all main operating systems and ensures the maintainability of our project in the future. We will describe FUTURES integration into GRASS GIS and demonstrate its usage on a case study in Asheville, North Carolina. The developed dataset and tutorial for this case study enable researchers to experiment with the model, explore its potential or even modify the model for their applications.

scholarly journals Open-source approaches for location cover models: capabilities and efficiency

2021 ◽  
Author(s):  
Huanfa Chen ◽  
Alan T. Murray ◽  
Rui Jiang
Keyword(s):  
Decision Making ◽  
Open Source ◽  
Case Studies ◽  
Service Systems ◽  
Solution Quality ◽  
Public And Private ◽  
Management Planning ◽  
Location Models ◽  
Gis Tools ◽  
Computing Performance

AbstractLocation cover models are aimed at siting facilities so as to provide service to demand efficiently. These models are crucial in the management, planning and decision-making of service systems in public and private sectors. As a result, location cover models have been incorporated in a range of GIS tools, either closed or open source. Among them, open-source tools are advantageous due to transparency and reproducibility. Nonetheless, the capabilities and limitations of location cover tools remain largely unknown, necessitating further investigation and assessment. To this end, this paper provides an overview of the open-source tools that are capable of structuring and solving location cover models. Case studies are provided to demonstrate access of location models through different open-source tools as well as exploring solution quality, scalability, computing performance and reproducibility. Directions for improving location cover models accessible through open-source tools are summarized based on this review.

scholarly journals Relief visualization techniques using free and open source GIS tools

2018 ◽  
Vol 50 (2) ◽  
pp. 61-71 ◽  
Author(s):  
Jordan Tzvetkov
Keyword(s):  
Open Source ◽  
The Other ◽  
Advantages And Disadvantages ◽  
Gis Tools ◽  
Open Source Gis ◽  
The One ◽  
Data Layers ◽  
Visualization Techniques ◽  
Criteria For Selection ◽  
Selection Of

Abstract The aim of the article is to present different relief visualization techniques created using only free and open source GIS tools, such as QGIS and RVT. The criteria for selection of these techniques are that they should be, on the one hand, simple and fast for implementation and on the other suitable for multiple visualization purposes. Here we present several techniques which combine hillshade with other relief data layers derived from DEM and an assessment of advantages and disadvantages of their visualization.

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