Welcome to the District of Columbia
Association of Land Surveyors (DCALS)

Founded in 2001, DCALS is a non-profit organization dedicated to the advancement of the sciences of Surveying and Mapping and to the improvement of the Profession of Land Surveying in the District of Columbia. 



DCALS garments to show your support is now on the store page. Fine attire from Lands End.

DCALS 2014!

The Big Build is Back and DCALS would like your support teaching the youth of today!

The Big Build

A Hands-on Family Festival of Tools, Trucks, and Construction

Saturday, September 20, 10 am–4 pm

Be a builder for the day at the Big Build festival! Amateur builders young and old can discover what it's like to build a brick wall, carve stone, hammer nails, and much more as they work side by side with designers, builders, and artisans demonstrating their skills. Meet plumbers, electricians, ironworkers, landscape architects, woodworkers, and experts in many other fields to learn about their professions and hobbies. At this year's Big Build festival you can:

  • Climb aboard cranes and tractors
  • Build a brick wall
  • Construct a log cabin
  • Carve stone
  • Imagine a sculpture made of plumbing pipes
  • Compete in a nail driving contest
  • Create a hardware wind chime to take home

New This Year

The Big Build Celebrates Play

This year, the Big Build festival highlights the Museum's exhibition PLAY WORK BUILD and the theme of play. Similar to the exhibition, Big Build will celebrate the connection between children's affinity to construct imaginary worlds and the professionals who create the built world around us.  



Please join us September 10, for our annual Inauguration of Officers Gala Dinner. Vincent Coztanzi will pass the gavel to the incoming 14th President Joe Snider (first two-term president in DCALS history). Spouses and guests are welcome and will enjoy the evening.


“HENRY B. LOOKER . . . The Man Who Transformed DC Surveying”

Henry Brigham Looker was a 32-year-old West Point trained civil engineer when he ‘put out his shingle’ in downtown Washington as an engineer & land surveyor in 1890. Quickly he became known for skilled and accurate work, and some of our region’s most notable turn-of-the-century projects are by him, not only in DC but also Maryland and Virginia. At the urging of local business leaders, he volunteered in 1895 to join the staff at DC Surveyors Office. The city allowed him to continue private engineering practice while working for them.

Looker was only with DCSO for 8 years, becoming official DC Surveyor in 1897. He took a leave-of-absence in 1898 to fight the Spanish-American War. But in just those few years he transformed DC  surveying and subdivision procedures, bringing Washington out of the 1800s into our modern age. His many innovations gave the city a world-class Surveyors Office for the next six decades — and most of his practices are still followed in DC to our day. Tragically he died young. He would have done more.


Here is your link for this intriguing documentary by Chas Langelan D.C.'s first registered Surveyor!

Save the following dates: 

DC Advanced Surveying Seminar - November 7, 2014 at Gallaudet University


December General Membership Meeting – December 10, 2014 Maggiano’s Little Italy



District of Columbia Association of Land Surveyor’s Store is now online for your convenience with Credit Card purchases through secure server PAYPAL most credit cards accepted.  


Save District of Columbia Boundary Stones.