# NGDS-Metadatabase-v4

The National Geothermal Data System (NGDS) supports the storage and search of information resources relevant to the discovery, understanding, and utilization of geothermal energy. It is a network of data providers supplying data and metadata, with an aggregating feature that provides a single entry point for searching resources available through the system

Production build for https://data.geothermaldata.org

Requirements

• Ubuntu 20.04
• Postgres 12 -Nodejs 8.11.3
• Docker pyCsw - docker pull geopython/pycsw

Refer to Installation Notes in /docs for requirement details

Node Applications

4 nodejs applications provide web services

• ngds-app-ssl - primary user interface
• ngds-app - http/https redirector
• ngds-pool - database middle ware for high throughput
• ngds-pysearch - database middle ware for pycsw

Database

This system uses 2 postgres databases.

• geothermal
• pycsw

DOCKER

The pycsw environment is contained in a docker container and connects to the postgres pycsw database.

Spatial Components

The mapping and spatial search process utilize:

• leaflet client library
• ESRI leaflet
• pyCSW csw search features
• postGIS
• ArcGIS World Map

Startup Commands

1 - sudo service postgresql start

Postgres - database includes 2 schemas pycsw and geothermal 

2 - sudo docker container start pycsw

Dockerized version of pycsw - provides standard OGC interface

3 - systemctl start ngds-pg-pool

node.js middleware implmentation provides high performance pooling
to the geothermal database

4 - systemctl start ngds-pysearch

node.js middleware implmentation provides high perf pooling
to the pycsw database

5 - systemctl start ngds-app-ssl

node.js user interface and api front end