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.

Today is #GivingTuesday

Each year on the Tuesday after Thanksgiving, nonprofits across the globe participate in #Giving Tuesday. #Giving Tuesday is the online event that began in 2012 and has resulted in donations for thousands of nonprofits large and small. Participating organizations have witnessed steady increases year after year — this year, we hope that you will make SkyTruth the nonprofit you choose to support because without you, we would not be able achieve our mission to share the view from space to inspire people to protect the environment. Our work is possible because of you. This year, we are excited to announce that one of our generous donors has agreed to match all #GivingTuesday donations up to $1000! This means that your gift will go twice as far! Please make your gift today, November 27th, before midnight in order to double your impact. Finally, be sure to watch our social media channels (Facebook, Twitter, and Instagram) throughout the day to track our progress in meeting this matching challenge. Donate here and thank you in advance for your support for SkyTruth. Seeing is believing. And if you can see it, you can change it.

Big Changes Coming to SkyTruth Alerts

For the last year or so we’ve been working to revamp SkyTruth Alerts, an app we built for ourselves in 2011, and then opened up to the public a year later. The Alerts lets you see environmental incidents and notifications on a map as they are reported, and allows subscribers to sign up to receive email notifications about reported environmental incidents in areas they care about (aka “Areas of Interest” or AOIs). Technology has made a few leaps since then, so it was time for an overhaul. We’ve added some new features too. We’re excited about the changes, and we hope you will be too.  

What’s Changed?

In a lot of ways, the new SkyTruth Alerts app works the way it always has: anyone can view the map and see the latest reported alerts for a particular area. These notifications come from federal and state websites that we have “scraped” to obtain the reports. The largest source of data is the nationwide oil and hazardous materials spill reports collected by the National Response Center (i.e., NRC Reports). Anyone can sign up to receive email notifications about incidents in their AOIs.

New and Restored Sources of Alerts

As part of the Alerts revamp, we’ve restored and/or added the following sources of alerts:

  • West Virginia oil & gas drilling permits –  restored
  • Colorado oil & gas drilling permits – new
  • Florida Pollution Reports – new

Account Management

We’ve also added account management so you can update your AOIs or change your email address more easily. Signing up for an account will also let you take advantage of new tools we’ll be rolling out in the coming months (we’ll keep you posted after the launch).

New Look!

This is what SkyTruth Alerts looks like right now:

This is what you’ll see when you first open the revamped SkyTruth Alerts (subject to some possible changes over the next few weeks, as we respond to feedback and suggestions from our alpha testers):

New Features!

Here are a few of the new features we’ve added:

New Ways to Create AOIs

Right now, SkyTruth Alerts lets you create AOIs that are a square or rectangle, but that’s not always the ideal shape. In the new version, we’ve added some tools that give you a little more control: you can draw a polygon, take a “snapshot” your current map view, or select a state or county boundary from a list of pre-defined AOIs):

After you create an AOI, you can edit your AOI (or delete it and start again) before giving it a name and saving it to your My Areas list.

Filter Out the Noise

We’ve added several ways to filter what you see in Alerts, so that you can focus on what’s important to you. SkyTruth Alerts shows you the 100 most-recent incidents in your map view (double what’s shown in the current version), so filtering has the added benefit of showing you more of the types of alerts you want to see. You can filter alerts by:

Date Range

Type of Alert

Base Layers

Select from a couple of different map backdrops (“base layers”) so you can focus on what’s important to you. Below is a screenshot of SkyTruth Alerts using the “Minimal” base layer.

Alerts Within AOI Only

This can be useful if there are a lot of alerts in the surrounding area that are more recent than the alerts within your AOI.  

In the image below, there are only a few alerts are shown in the West Virginia AOI:

However, once alerts are limited to within the AOI, the picture changes:

New Ways to View Alerts Markers

In some places, there are many, many alerts in the same location. This can make it hard to move around the map because you end up clicking or tapping an alert marker when you wanted move around in the map view. It can also be hard to “grab” a particular alert marker from a stack of them.

In the first screenshot, clustering is turned on, making it easier to move around the map. Click on a cluster marker to zoom in on that area and see more alerts.

Once you’ve zeroed in on your area of interest, it can still be hard to see the forest for the trees in some locations. In the next image, clustering is turned off. You can see that there are a lot of alerts in this area, but how many exactly?

The image below shows the same area as the one above. If you click on one of the alert markers, it will “explode,” showing you all of the alerts in that location. Click on any of the exploded markers to view the report.

So when’s the Launch?

We’re getting ready to begin alpha testing in in mid-November. Lots of our current subscribers have volunteered to be testers and will be helping us put the finishing touches on the app. A big thank you to all of you who are helping us with that! Testing will last four weeks, and during that time we’ll be making continuous updates based on feedback we receive. We expect to go live with the new version by the end of the year.

SkyTruth Founder John Amos to Speak in Shepherdstown

Did you see the recent front page article in the Washington Post that featured SkyTruth’s work tracking a 14-year oil spill in the Gulf of Mexico? Why is Shepherdstown’s own SkyTruth featured so often in the international press? Come find out!

Founder John Amos and key staff members Christian Thomas and Ry Covington will talk about our work tracking pollution, mapping flaring and fracking, revealing the true scope of devastation from mountaintop mining and illuminating commercial overfishing. There’ll be a Q&A session followed by some light refreshments. For those of you who know us already, please join us with a friend you think might be interested to learn more about this West Virginia-based nonprofit that has global impacts.

SkyTruth: sharing the view from space to inspire people to protect the environment. If you can see it, you can change it!

Event details:

Tuesday, November 13th, 2018 5:30pm-7pm
Shepherd University
Robert C. Byrd Center for Congressional History and Education
213 N King Street
Shepherdstown, West Virginia 25443

Rockwool — Industry comes to SkyTruth’s backyard

Rockwool, a multinational corporation based in Denmark, is planning to build a new insulation manufacturing plant in Jefferson County, West Virginia, 5 miles from SkyTruth’s front door. If built, the plant will feature a 21-story (~210 feet) tall smokestack that will spew chemicals including formaldehyde, sulfuric acid mist, and hydrochloric acid.  For the full list of pollutants they plan to emit, see page 428 of the Roxul application submitted to the WV DEP on Nov 20, 2017.

This PlanetScope image shows the locations of the four schools located within three miles of the Rockwool site, along with the route of the proposed Mountaineer Pipeline.

The concerns over this predicted air pollution from the Rockwool facility are compounded by its location. Four schools are within 3 miles of the site (the site here is defined by the latitude and longitude provided by this WV DEP report, see page 1): two elementary schools, one middle school, and one high school. The closest of these is North Jefferson Elementary School, which is located a mere 3,400 feet from the Rockwool site as shown in the WV DEP permit application.

This wind rose (generated by The Global Wind Atlas) shows the prevailing wind directions for the area near the Rockwool facility.

This wind rose (generated using data from a weather station at the Eastern West Virginia Regional Airport) shows the prevailing wind directions for the area near the Rockwool facility from 2012-2016. This wind rose was included in the Air Modeling Report submitted by Roxul to the WV DEP (see page 30).

To read these wind roses, the outer edge indicates the direction from which the wind blows. With the dominant wind direction from the northwest, all four of the schools will typically be downwind from this facility, frequently exposing students, faculty and staff to the pollutants Rockwool says they plan to emit.

Last August, SkyTruth worked with the Eastern Panhandle Protectors to produce a map of the Mountaineer Pipeline Eastern Panhandle Expansion.  What’s the connection? As it turns out, natural gas delivered via this pipeline will feed the Rockwool plant.  One thing leads to another….

This PlanetScope image, collected on August 6, 2018, of the Rockwool site shows recent construction activity. Less than a mile from the site is the North Jefferson Elementary School.

The concerned citizens of Jefferson County are making their voices heard, and are actively opposing the final permits and approvals needed for construction of the Rockwool facility. As a nonprofit that makes its home in West Virginia, SkyTruth is pleased to offer access to our maps (including an interactive web map, which will be updated as we learn more), to the citizens of Jefferson County, in the hopes that these resources will help raise awareness and engage the community on this potentially serious public health issue.