Annotate & Share Your SkyTruth Alerts Map

SkyTruth’s latest update to Alerts adds features that allow subscribers to annotate a map view and share it with co-workers, organizations and interested parties. These additions add to a rich set of features that are unique to online mapping and satellite imagery viewing — all available for free to the public.

New annotation features allow subscribers to:
  • Highlight traits found in satellite imagery
  • Measure the area of new development or changes in a habitat’s footprint
  • Add information to a SkyTruth Alerts incident
  • Measure boundary setbacks or the distance between 2 objects
  • Add text to the map in preparation for sharing with others

This is accomplished with a set of tools that can annotate by using shapes (rectangles, circles, polygons), lines, text, markers and measurements. A guide to these tools is available here.

New sharing capabilities allow you to save current map views either as a JPG image or a unique URL. Visit here for a  guide to sharing and some of its limitations.

The full online manual is available here.

We’ll be testing and fine-tuning these features throughout the summer. If you run into problems or want to suggest features you’d like to use with Alerts, please contact us at feedback@skytruth.org. We would also enjoy hearing about how you’re able to make use of these features!

PA and WV Drilling Alerts have Moved to SkyTruth Alerts

If you’ve been on the Pennsylvania Drilling Alerts or West Virginia Drilling Alerts pages lately, you know that they’ve been semi-broken for a while. The technology we’re using on the Drilling Alerts pages is pretty old and will be retired soon. However, you can now do the same county monitoring in SkyTruth Alerts. We’d love it if you’d take it for a spin and tell us what you think.

The PA and WV Drilling Alerts pages have been semi-broken for a while.

We’ve set up two public accounts at SkyTruth Alerts — one for Pennsylvania counties and one for West Virginia counties — that will let you view county alerts in pretty much the same way you did on the Drilling Alerts pages, and with some extra features that we use in-house and hope you’ll find useful too.

To view Drilling Alerts at SkyTruth Alerts:

  1. Go to https://alerts.skytruth.org
  2. Select Login from the top right of the map.  Log in using the UserID and Password information below.

    UserID: Pennsylvania or WestVirginia (no spaces)
    Password: skytruth
  3. Select the My AOIs tab from the left sidebar and choose a county.
  4. Select the Alerts tab from the left sidebar and choose which alerts you want to see.
  5. You can opt to view only alerts within the county you selected and view alerts for a particular date range (Alerts tab).
  6. You can also view near-real-time satellite imagery to help you assess what’s happening on the ground (My AOIs tab).

If you plan to keep using SkyTruth Alerts, consider creating your own account. You’ll be able to keep your settings instead of having to select them every time you log in, and you can optionally receive email notifications when new alerts come in. If you have comments, suggestions, questions, etc., contact us at feedback@skytruth.org.

Satellite Imagery comes to SkyTruth Alerts

Given SkyTruth’s mission of using the view from space to motivate people to protect the environment, it was only a matter of time before satellite imagery would find its way into our Alerts application. With 2019 comes the ability to visually check out what’s taking place in your areas of interest (AOIs), all inside the same application that notifies you about environmental events in those areas.

Newly available imagery in Alerts comes from Sentinel-2 satellites, an Earth observation mission from the European Union’s Copernicus Program. Copernicus systematically acquires optical imagery at high spatial resolution (10 to 60 meters) over land and coastal waters, with new images available about every five days in many areas.

What you can see with 10 meter resolution imagery

The 10m resolution images from Sentinel 2 satellites should work well if you’re searching for new roads, expansion of large disturbance areas, or changes in natural boundaries. But you’ll be disappointed if you’re trying to identify tree cover or the type of vehicle that’s parked in your driveway.

In a 10m resolution image, one pixel represents a 10 meter by 10 meter area, so objects will need to be considerably larger than that for any detail to be discernible.

Here are two 10m images over a gas drilling site in Pennsylvania, taken one year apart.

 

Viewing satellite imagery inside SkyTruth Alerts

Most new features in Alerts require you to login. From alerts.skytruth.org, click on the  LOGIN  link in the header and follow the instructions. First time users will need to register for a new account.

NOTE: If you used our original Alerts, you’ll still need to register for an account the first time. Just remember to use the same email that you used to subscribe to AOIs in the original Alerts.

 

2. Identify the Area of Interest (AOI)

Start by clicking on the My Areas tab.

If you’ve already subscribed to an AOI, you can easily select it by clicking on its thumbnail.

Or, you can start a new AOI by clicking “Explore a New Area”.

 

3. Click the Sentinel Imagery checkbox.

 

4. Select your image date

Notes

  • Feel free to adjust the cloud cover or enter a date range, then click Filter to change the images that are available.
  • You can remove the alerts markers by, 1) Clicking the Alerts tab, 2) checking/unchecking the alerts you want on the map, 3) Clicking the My Areas tab to return the AOI controls.
  • If you like the AOI you’ve created, don’t forget to click Add this AOI to my list.
  • Use cloud cover percentage as a guidance. This represents the larger satellite image, which may cover substantially more area than your AOI. So it’s possible to have a low percentage of cloud cover and still have your AOI covered mostly by clouds.
  • You can add highways, towns, etc., to your image by clicking the Show Labels checkbox.

What’s next with Alerts and imagery

The true color images shown throughout this post are just part of what’s possible with satellite imagery. In addition to the red, green and blue bands that give images their true color appearance, most satellites catch additional bands that can include near-infrared, mid-infrared, far-infrared and thermal-infrared. Identifying landscape patterns and features using combinations of these spectral bands starts with additional processing by various data enhancement techniques, and is often followed by some type of classification algorithm to help understand what each feature or pattern represents. Doing this work is one of the challenges faced by SkyTruth Geospatial Analysts and other scientists around the world.

What do you think?

We’d like to know what you think about the addition of Sentinel-2 satellite images to the Alerts system: Will you use this new feature? What does it help you do? How does it fall short? We’re working to make continual improvements to Alerts and we’d love to hear from you! Send us an email at at feedback@skytruth.org.

New Year, New Alerts

We just released a new version of SkyTruth Alerts, a service that notifies you about environmental incidents in areas you care about. It’s a tool we built to help us monitor environmental events in-house, and we’ve made it freely available to the public for the last six years.

We’re excited about the capabilities of the new Alerts — we wrote a blog post about it in November — and we’re looking forward to adding new features and alerts sources in the future. Here’s a quick rundown of what you need to know to get started with the new Alerts:

I used the original Alerts. Do I need to do anything to switch?

You don’t have to do a thing to continue receiving the same alert emails you’ve always received, although you’ll notice the emails have a new format. You can still view a specific alert by clicking on its link in the email.

If you want to add or change the areas of interest (AOIs) you monitor, or fine-tune the alerts you see or get emails for (a new feature), we now ask you to create an account. We only collect your email address, which we need to send you emails. We have plans to add features in the future that will also need a user account in order for them to work.

OK, so how do I register for an account in the new Alerts?

Go to SkyTruth Alerts and select Login from the burger menu. If it’s your first time here, click the Register here link to create an account.

The original Alerts worked fine! Why did SkyTruth create a new Alerts?

Web-based software has a pretty short life-span and the first Alerts system was getting harder and harder to maintain. Additionally, SkyTruth wanted to expand the number and types of alerts that we were saving as well as work on new features such as notifying subscribers when there is a change in their AOI. It became clear that the original Alerts wouldn’t be able to handle these additions.

Does the new Alerts do everything that the original Alerts did?

Almost! We’re still working on the API that a few subscribers used to integrate alerts with other software. If you spot anything else that we missed, please let us know by emailing us at feedback@skytruth.org.

Until we have the API fixed, we’ll keep the original Alerts available at https://alerts1.skytruth.org. Note that this should only be used for redirecting the API and embedded links in KMZ/KML files. If your KMZ file contained a link to https://alerts.skytruth.org, you can still get it to work by pointing to https://alerts1.skytruth.org.

What major new features should I know about today?
  • You can filter the alerts you receive emails for.
  • You can filter the alerts shown on the map by type and date.
  • You can create AOIs that are polygon shaped.
  • You can choose a pre-defined AOI. Currently, we have states and counties ready and are working on more.
  • We’ve added or restored alerts for:
    • Oil and Gas well permits from West Virginia and Colorado
    • Florida Pollution
Can you add alerts from other websites?

Yes! Let us know what a useful source for alerts would be and we’ll consider it for the future. That email again is feedback@skytruth.org.

No NRC Reports since Nov. 18 [UPDATED]

[Update: As of Dec. 16, 2018, NRC reports are being released again.]

If you are a SkyTruth Alerts subscriber, you may have noticed that there have been no new NRC reports lately. This is because the NRC has not published any new reports since November 18. We’ve contacted them to try and find out what’s going on, and we’ll have them back in SkyTruth Alerts as soon as we can.