The Massachusetts Continuously Operating Reference Station Network (MaCORS)

The MassDOT Survey Office is responsible for the maintenance of the horizontal and vertical network of geodetic survey control stations throughout Massachusetts, and MaCORS serves to enhance this network.

MaCORS is a system of continuously operating Global Navigation Satellite System (GNSS) reference stations located throughout Massachusetts. It is designed to assist surveying, engineering, and GIS mapping professionals in a variety of static and real-time differential GNSS positioning applications. It is comprised of 22 GNSS base stations approximately 50 km apart.

Positional information can be obtained from this network through the post-processing of raw static (RINEX) data downloaded from this website, or in real-time by using correction data broadcast via the internet. Depending on equipment and procedures, MaCORS can provide users the ability to achieve 1-3 cm positioning for surveying applications or sub-meter positioning for GIS mapping applications.

To register for use of the website (RINEX Services) or real-time network (RTK):

1. Click on the Register link.
2. Complete the user registration form. Read the privacy notice and check the box to acknowledge you accept these conditions. Click 'Submit' to complete the registration process. (Please note that the username and password you enter here will be your website and real-time login; be sure to write them down.)
3. An email will be sent to the address you provided. (Note: This link will expire 5 days after the email is sent to you).
4. Click on the link in the email. A follow-up email will automatically be sent to you to confirm that the account has been established.
5. Click ‘Login’ and enter your username and password. Select from the available real-time and/or static packages. Once you’ve made your selection(s), add them to your cart and proceed to the check-out page. (Note: There are two packages available: RINEX and RTK. Choosing RTK will allow you to use any of the existing RTK products that your GPS/GNSS rover equipment will support).
6. A window opens with the MaCORS Terms of Use Statement. Read it and check the box to acknowledge that you accept these terms. Click "Subscribe" to complete the subscription process (Note: To change your product selection, click the "Modify" button to return to the previous screen.)
7. An email will be sent to you confirming that your order has been placed and providing information on how to check its status.
8. Once approved, you will receive a confirmation email and will be ready to use MaCORS.