Agency Focused Web Components for Geosciences

Table of Contents

• Introduction
• How to use
• Test Cases
• Community
• Feedback
• Scalability and To Do's
• License
• Acknowledgements
• References

Introduction

This project introduces Geo-WC, a versatile, generalized web-based framework designed specifically for geoscience to retrieve up-to-date data from various institutions using different data formats. The Geo-WC utilizes a user-friendly approach, employing a simple HTML declarative syntax to unify information in a consolidated processing interface. The framework provides essential information, including maps, geo-data, observations, alerts, and flood maps, presenting outputs in formats such as maps, graphs, tables, and JSON/CSV.

The generic component integrates HydroLang and CacheManager libraries, with CacheManager utilizing the IndexedDB API for data storage, while the map feature incorporates the Leaflet library.

Example agencies such as USGS, FEMA, EPA, NWS, and EAUK, each serving different purposes and providing services in different data types, have been added to the application.

How to use

Please download the library and run index.html. If a new html file should be created, the javascript library for the relevant agency should be loaded onto the file as a script. The USGS agency is given as an example.

<script type="module" src="./lib/usgs/usgsComponent.js">
</script>

The library for USGS, FEMA, EPA, NWS, and EAUK agencies is readily available in generic form.

The definition of an agency

The definition of an example agency is as follows:

<agencyname-ml service="servicetype"> 
</agencyname-ml>

The 'service' parameter, essential for defining an agency, determines the specific service offered by the data provider.

Data retrieval

To retrieve data from any source, it is necessary to prepare and transmit specific request information to a web service.

<agencyname-ml service="servicetype">
<api-args raw="true" <!-- Parameters of agencies -- > </api-args> 
<api-args startDate="2023-11-01" timeInterval="1d"> </api-args> 
</agencyname-ml>

The definition of can be done in two different ways. In the case of "raw=true," the parameters of agencies are explicitly written in detail. In the alternative definition, agencies do not need to specify their parameters explicitly. Default parameters are calculated by the application.

Data output

Displaying data in tabular format can be done using the geoweb-table component, which creates an HTML table prompt on screen, as following:

<agencyname-ml service="servicetype">
<api-args startDate="2023-11-01" timeInterval="1d"> </api-args> 
<geoweb-table> </geoweb-table>
</agencyname-ml>

To create a map on screen, geoweb-map component, which leverages the Leaflet library is used as following:

<agencyname-ml service="servicetype">
<api-args startDate="2023-11-01" timeInterval="1d"> </api-args> 
<geoweb-map> </geoweb-map>
</agencyname-ml>

"geoweb-graph" tag presents the relevant data graphically using the Google Charts library.

<agencyname-ml service="servicetype">
<api-args startDate="2023-11-01" timeInterval="1d"> </api-args> 
<geoweb-graph> </geoweb-graph>
</agencyname-ml>

To download data in CSV or JSON formats for all agencies, the geoweb-output component can be used as following:

<agencyname-ml service="servicetype">
<api-args startDate="2023-11-01" timeInterval="1d"> </api-args> 
<geoweb-output type="json"> </geoweb-output>
<geoweb-output type="csv"> </geoweb-output>
</agencyname-ml>

Defining a new agency

A new agency can be easily created using the generic Geo-WC framework.

• A folder named after the agency to be added (usgs, fema, etc.) is opened under 'lib,' and within that folder, a file named agencyNameComponent.js (e.g., usgsComponent, femaComponent, etc.) is created.

• The components of agencies follow a standard structure. The content of any agency component can be utilized for a new agency component.

• The source and datatype information in the agencynameComponent.js file is updated for the new agency.

• Agency-specific transformation functions should be prepared.

• In the section of the index.html page, the newly created agencyNameComponent.js file is imported.

• The definitions for the agency are made within the tags.

• Code snippets suitable for the agency's outputs are written.

Test Cases

The usage of the library through its core structure can be found within the following files:

• "test-cases" folder
  • test-output.html
  • test-retrieve.html

Community

The developed Geo-WC is applicable to entry-level programmers, researchers, and educational environments including high schools and universities, facilitating the process of creating web pages. In terms of governmental and higher-level applications, the features of Geo-WC represent some of the most influential and commonly used in the fields of environmental and hydrological sciences. Developers from different disciplines can integrate their agencies with Geo-WC. This enables greater collaboration that benefits research and education.

Feedback

Please feel free to send feedback to us on any issues found by filing an issue.

Scalability and To Do's

Geo-WC is not limited to the agencies and data types/formats implemented, but rather provides a boilerplate for new features to be added. The Geo-WC framework allows for the development of new subcomponents tailored to various scopes.

• Agencies in different scientific fields will be added to the framework.
• Different data types/formats will be added to the framework.
• Includes a limited set of subcomponents, including a graph, table, export and map.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgements

This project is developed by the University of Iowa Hydroinformatics Lab (UIHI Lab) and is supported by Sakarya University, Turkiye.

References

Kaynak, S., Kaynak, B., Erazo Ramirez, C., & Demir, I. (2024). Geo-WC: Custom Web Components for Earth Science Organizations and Agencies. EarthArXiv. doi:10.31223/X5FX2H