Results 1 to 10 of about 10,023 (239)
PostGIS-powered proximity queries: implementation and Google Maps visualization [PDF]
PeerJ Computer ScienceLocation-based services require efficient methods to calculate nearby points of interest. This article presents an implementation methodology for proximity queries using PostgreSQL’s PostGIS extension, focusing on the ST_DWithin function and spatial ...
Pavan Kumar Papasani, Ravi Teja Papasani
doaj +5 more sources
A PostgreSQL/PostGIS Implementation for the Sightseeing Tour Planning Problem [PDF]
Jurnal Rekayasa Elektrika, 2013 This article discusses a procedure for finding the best multi stops route for sightseeing tour through a road network. The procedure involves building a database containing nodes and road network in PostgreSQL, calculating the shortest distance between a
Ardiansyah ., Ruslan Rainis
doaj +6 more sources
Geodesy and Cartography, 2022 This article discusses a method for creating a risk map of natural disasters for a specific area using PostGIS analysis. This method, which is described in detail, is based entirely on the use of open-source programs and spatial SQL directives.
Levan Natsvlishvili +2 more
doaj +4 more sources
rpostgis: Linking R with a PostGIS Spatial Database [PDF]
The R Journal, 2018 With the proliferation of sensors and the ease of data collection from online sources, large datasets have become the norm in many scientific disciplines, and efficient data storage, management, and retrival is imperative for large research projects ...
David N. Bucklin, M. Basille
semanticscholar +3 more sources
WORKFLOW AUTOMATION WITH POSTGIS TOPOLOGY
Geoforum Perspektiv, 2018 Traditionally, a process of changing district borders can be a long and cumbersome process involving several layers of political decision-making. By using PostGIS topology and database triggers the workflow can be optimised and the setup automated ...
Anders Møller Jacobsen
doaj +3 more sources
VOXEL DATA MANAGEMENT AND ANALYSIS IN POSTGRESQL/POSTGIS UNDER DIFFERENT DATA LAYOUTS [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020 Three-dimensional (3D) raster data (also named voxel) is important sources for 3D geo-information applications, which have long been used for modelling continuous phenomena such as geological and medical objects. Our world can be represented in voxels by
W. Li, S. Zlatanova, B. Gorte
doaj +3 more sources
Web client for PostGIS—the concept and implementation
Geoinformatics FCE CTU, 2013 PostgreSQL with PostGIS extension plays one of the major roles in many complex GIS frameworks. There exist many possibilities how to access such data storage, but most of them might be seen as not simple for new users.
Michal Kepka, Jan Ježek
doaj +4 more sources
Evaluating Spatio-temporal Data Models for Trajectories in PostGIS Databases [PDF]
GI_Forum, 2018 Research in transport, ecology, health and other fields stands to profit from an improved understanding of movement. As movement data availability improves, the need for appropriate movement data analysis increases.
A. Graser
semanticscholar +3 more sources
PostGIS-T: towards a spatiotemporal PostgreSQL database extension
Revista Brasileira de Cartografia, 2017 The temporal dimension of spatial data has been the subject of discussion in the literature for a long time. While there are numerous Database Management System (DBMS) solutions for spatial dimension, we do not observe the same situation for ...
R. Simões +4 more
semanticscholar +5 more sources
Developing an Intelligent PostGIS Database to Support Accessibility Tools for Urban Pedestrians [PDF]
Urban Science, 2018 People with mobility impairment must travel through cities with extra care. An intelligent database of Maps for Easy Paths (MEP) project for storing and retrieving accessibility information about a particular path by using PostGIS may enable the public ...
Daniel Sinkonde +4 more
doaj +3 more sources