Usage of Web Map Tile Service for the Seamless Digital Geological Map of Japan using Free and Open Source Software

This paper discusses the research-based origins and modular architecture of an open source geospatial tool that facilitates synchronous individual and group discussions using the medium of a Web map service. The software draws on existing open source geospatial projects and associated libraries and techniques that have evolved as part of the new generation of Web applications. The purpose of the software is discussed, highlighting the fusion of existing open source projects to produce new tools. Two case studies are briefly discussed to illustrate the value an open source approach brings to communities who would remain otherwise outside the reach of proprietary software tools. The paper concludes with comments on the project’s future evolution as an open source participatory mapping platform.

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The advancement of utilizing geospatial information via GSI Maps

Abstracts of the ICA ◽

10.5194/ica-abs-1-252-2019 ◽

2019 ◽

Vol 1 ◽

pp. 1-2

Author(s):

Hirosato Mogi

Keyword(s):

Open Source ◽

Open Source Software ◽

Open Data ◽

Geospatial Information ◽

Secondary Use ◽

Web Map ◽

Public Data ◽

The Government ◽

Map Data ◽

Machine Readable

Abstract. The Geospatial Information Authority of Japan (GSI) is the national organization that has jurisdiction over the Survey Act, and develops geospatial information. We are also promoting utilization of them based on the Basic Act on the Advancement of Utilizing Geospatial Information. In addition, the Japanese government is promoting the Open Data initiative, in which the government widely discloses public data in machine-readable formats and allows secondary use of them. In accordance with these laws and initiative, we aim to realize a society where geospatial information can be widely and highly utilized by the disclosure of geospatial information. In order to achieve our mission, we are working on providing map data using “GSI Maps” (https://maps.gsi.go.jp/) which is a web map developed by using open source software (OSS) as the basis (Figure 1a). In this paper, we introduce “Three Open Policies” to promote utilizing geospatial information provided via GSI Maps.

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Determining the lithogeochemical background concentrations of 39 elements in Bavarian rocks

10.21203/rs.3.rs-695646/v1 ◽

2021 ◽

Author(s):

Bernhard Wagner ◽

Anneke Tammen ◽

Dietmar Jung

Keyword(s):

Trace Elements ◽

Open Source ◽

Large Majority ◽

Background Concentrations ◽

Statistical Parameters ◽

Typical Element ◽

Background Values ◽

Web Map ◽

Source Program ◽

Geological Map

Abstract Typical element background concentrations of rock units in Bavaria were evaluated by statistical means and presented in a lithogeochemical map, derived from the geological map at a scale of 1:25,000. The elements include 39 geogenic main and trace elements (SiO2, Al2O3, Fe2O3, MnO, MgO, CaO, Na2O, K2O, TiO2, P2O5 Li, Be, Sc, V, Cr, Co, Ni, Cu, Zn, Ga, As, Rb, Sr, Y, Zr, Nb, Mo, Cd, Sn, Sb, Cs, Ba, La, Ce, Tl, Pb, Bi , Th and U). The distributions of element concentrations in the lithogeochemical units follow closely lognormal patterns in a large majority of cases. Statistical parameters (10th, 25th, 50th, 75th, 90th percentiles) of investigated elements were determined using the cenfit function of the NADA package within the open source program R. The investigation, based on 8,838 analysed samples, provided data for about 2/3 of the area of Bavaria. The lithogeochemical map with medians (50th percentiles) and background values (90th percentiles) of the investigated elements is available in a web map application. Thus, the regional geogenic background values of the investigated elements in Bavaria are publicly available for a large variety of applications.

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A High-Concurrency Web Map Tile Service Built with Open-Source Software

Modern Accelerator Technologies for Geographic Information Science ◽

10.1007/978-1-4614-8745-6_14 ◽

2013 ◽

pp. 183-195 ◽

Cited By ~ 1

Author(s):

Huayi Wu ◽

Xuefeng Guan ◽

Tianming Liu ◽

Lan You ◽

Zhenqiang Li

Keyword(s):

Open Source ◽

Open Source Software ◽

Web Map

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DESIGN AND DEVELOPMENT OF THE UN VECTOR TILE TOOLKIT

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-4-w14-57-2019 ◽

2019 ◽

Vol XLII-4/W14 ◽

pp. 57-62 ◽

Cited By ~ 1

Author(s):

H. Fujimura ◽

O. Martin Sanchez ◽

D. Gonzalez Ferreiro ◽

Y. Kayama ◽

H. Hayashi ◽

...

Keyword(s):

Open Source ◽

Open Source Software ◽

Information Services ◽

Design And Development ◽

Geospatial Information ◽

Web Map ◽

Software Frameworks ◽

Sustainable Community ◽

Open Gis

Abstract. The UN Vector Tile Toolkit (https://github.com/un-vector-tile-toolkit/) is a package of open source tools designed under the UN Open GIS Initiative to enable public basemap providers, such as the UN geospatial information services or mapping organizations of governments, among others, to deliver their basemap vector tiles leveraging the latest web map technologies. The toolkit provides a set of Node.js open source scripts designed for developers to use with existing and proven open-source software such as Tippecanoe, Maputnik and Vector Tile optimizer. The toolkit will help organizations to produce, host, style, and optimize fast and interoperable basemap vector tiles, making them available with various application frameworks. The talk will cover automatic and continuous updates of basemap vector tiles using a continuously updated PostGIS database which stores both the UN mission-specific basemap data and global OpenStreetMap data. The talk also focuses on how the project ensured interoperability with different existing enterprise geospatial software frameworks that use less-advanced web map libraries. The project aims to build a sustainable community of developers that support the provision of fast and interoperable basemap vector tiles.

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