RockScience Marine Chart Viewer for NOAA ENC
Embed interactive NOAA nautical charts using official government APIs. Covers U.S. waters, Great Lakes, and territories.
Consider an alternative
RockScience Marine Chart Viewer… shows warning signs in 2026 — compare the alternatives below before installing. Was last updated 1 year ago, and scores 30/100 on our health check.
- Small user base (<10 active installs)
- Very few reviews so far
- No update in over a year
- Only tested up to WordPress 6.8 (latest is 7.1)
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where RockScience Marine Chart Vi… stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| boating | #1 |
| charts | >100 |
| nautical | #6 |
| noaa | #1 |
| sailing | #18 |
About RockScience Marine Chart Viewer for NOA…
From the official readme · v2025.09.1Description
This is a SERVICE PLUGIN that provides real-time access to official NOAA nautical charts by connecting to external government APIs. The plugin acts as a bridge between your WordPress site and NOAA’s Electronic Navigational Chart (ENC) services.
Important: Marine chart data is provided by NOAA and only covers U.S. coastal waters, Great Lakes, and U.S. territories. For areas outside NOAA coverage, only the base ocean map will be displayed.
Service Features:
* Real-time NOAA nautical chart data via official APIs
* Interactive charts powered by ESRI ArcGIS mapping service
* Live chart updates from government sources
* No account registration required
* Core API for other marine service plugins
* Settings page for default coordinates
External Service Dependencies:
This plugin requires internet connectivity to function as it provides live chart data from:
* NOAA Chart Services (official government charts)
* ESRI ArcGIS API (mapping framework)
* No personal data is collected or transmitted
Chart Coverage:
Marine chart data is sourced from NOAA Electronic Navigational Charts (ENC) and covers:
* U.S. coastal waters (Atlantic, Pacific, Gulf of Mexico)
* Great Lakes
* U.S. territories (Alaska, Hawaii, Puerto Rico, etc.)
* Areas outside NOAA coverage will display base ocean maps only
External Services
This plugin connects to external services to provide nautical chart functionality:
ESRI ArcGIS API
– Service: https://js.arcgis.com/
– Purpose: Provides the mapping framework and JavaScript libraries needed to display interactive charts
– Data sent: No personal data is transmitted to ESRI servers
– Terms: https://www.esri.com/en-us/legal/terms/full-master-agreement
– Privacy: https://www.esri.com/en-us/privacy/overview
NOAA Chart Services
– Service: https://gis.charttools.noaa.gov/
– Purpose: Provides official NOAA Electronic Navigational Chart (ENC) data for display
– Data sent: Chart tile requests based on map location and zoom level (no personal data)
– Terms: https://www.noaa.gov/information-technology/website-policies
– Privacy: https://www.noaa.gov/privacy-policy
ArcGIS CDN Requirement and Licensing Notice
Important: This plugin requires the ESRI ArcGIS JavaScript API, which must be loaded from the official ESRI CDN at https://js.arcgis.com/ per ESRI’s licensing terms.
It is not legally permitted to self-host or bundle the ArcGIS API with this plugin.
Reference: ESRI ArcGIS JS API Terms
- The ArcGIS API is used solely to provide the mapping framework for NOAA chart display.
- No personal data is transmitted to ESRI.
- This requirement is due to ESRI’s license and is outside the control of this plugin’s author.
If you have questions about this requirement, please see the ESRI terms or contact the plugin author.
Installation
- Upload the plugin files to the
/wp-content/plugins/chart-viewer/directory - Activate the plugin through the ‘Plugins’ screen in WordPress
- Use the
[rs_enc_chart]shortcode in your posts or pages
Frequently asked questions
How do I use the shortcode?
Use [rs_enc_chart lat="41.5" lng="-71.4" zoom="12"] to display a chart centered at the specified coordinates. Available attributes: * lat – Latitude in decimal degrees (default from settings) * lng – Longitude in decimal degrees (default from settings) * zoom – Zoom level 6-16 (default: 13) * height – Chart height (default: 400px) * show_center_mark – Show center crosshair (default: true) * show_enhanced_status – Show coordinate display (default: true) * show_range_rings – Show distance rings (default: true)
How does mouse wheel zoom work?
Mouse wheel zoom is focus-aware to prevent accidental zooming while scrolling the page. Click on any chart to focus it (blue outline appears), then use mouse wheel to zoom. Click outside the chart to remove focus and disable wheel zoom.
Can I customize the default center?
Yes, go to Settings > Chart Settings to set default coordinates for new charts.
Changelog
This version adds a settings page for configuring default chart coordinates.
202507.7
- Added settings page for default coordinates
- Improved admin script loading
- Enhanced error handling
- Added focus-aware mouse wheel zoom
- Improved multiple chart support
- Better error detection and user feedback
Screenshots
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
FAQ
RockScience Marine Chart Viewer for…: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 17, 2026
Is RockScience Marine Chart Viewer… free?
Yes. RockScience Marine Chart Viewer… is free to download and use from the official WordPress.org plugin directory.
Is RockScience Marine Chart Viewer… safe to use in 2026?
RockScience Marine Chart Viewer… shows warning signs in 2026 — compare the alternatives below before installing. Was last updated 1 year ago, and scores 30/100 on our health check.
How many websites use RockScience Marine Chart Viewer…?
RockScience Marine Chart Viewer… is active on <10 WordPress websites and has been downloaded 367 times since it launched in September 2025. It was downloaded 38 times in the last 30 days.
Does RockScience Marine Chart Viewer… work with WordPress 7.1?
RockScience Marine Chart Viewer… is officially tested up to WordPress 6.8.11, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
When was RockScience Marine Chart Viewer… last updated?
The latest version, 2025.09.1, was released on September 23, 2025 (1 year ago).
Who makes RockScience Marine Chart Viewer…?
RockScience Marine Chart Viewer… is developed and maintained by Bob Damiano.
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