CGM Explorer

Community Geodetic Model (CGM)

A 2D Explorer based on Leaflet, an open-source JavaScript library for interactive maps, https://leafletjs.com, map data services from OpenStreetMap, https://www.openstreetmap.org, OpenTopoMap, https://www.opentopomap.org and leaflet esri plugin, https://esri.github.io/esri-leaflet, for Ersi basemap from ArcGIS and 2D time series plots based on Plotly.js, a high-level delarative charting library.

Community Geodetic Model

The Community Geodetic Model (CGM) provides displacement time series and velocities of the Earth’s surface over southern California using data from Global Navigation Satellite Systems (GNSS), which includes the Global Positioning System (GPS), and interferometric synthetic aperture radar (InSAR), both space-based geodetic observation techniques.

https://www.scec.org/research/cgm

Screen Capture

CGM data service

Software stack at the backend server node when postgres and postgis are being built from source:

• git
• gcc
• readline-develp
• zlib-devel
• json-c
• autoconf
• libxml2-devel
• libtool
• postgres version a10.5
• proj5
• gdal
• postgis version 2.5.1
• apache web server

Data preprocessing instructions are in doc/run-preprocess-data,

Deployment

Deployment is accomplished using Docker with docker-compose. Clone the git repository and run the commands below for development or production deployment.

Development Deployment

1. Run: docker-compose -f docker-compose.yml -f development.yml up -d
2. Run: ./load_insar.sh
3. After the build is complete, browse to http://localhost:8084
4. The development.yml maps the code directory to the container for easy code development and exposes port 5432 for directly accessing the Postgres database.

Production Deployment

1. Run: docker-compose -f docker-compose.yml up -d
2. Run: ./load_insar.sh
3. After build is complete, browse to http://server-name:8084
4. Optionally, set up a reverse proxy from a URL on an existing web server to localhost:8084.

Layout

Server Side

Postgres/Postgis database
data files (Hosted on INSAR LOCATION???)
PHP scripts for accessing database
Apache web service to manage incoming
   and outgoing instruction/data

Client Side

JS scripts to process and manage data product
Html web page for graphics display and user dashboard