Uav operator reported conducting a flight within iad class B airspace because he misread the chart.

Attributes
ACN	1534098
Time
Date	201803
Local Time Of Day	0601-1200
Place
Locale Reference	IAD.Airport
State Reference	DC
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	UAV - Unpiloted Aerial Vehicle
Operating Under FAR Part	Other 107
Flight Plan	VFR
Person 1
Function	Pilot Flying Single Pilot
Experience	Flight Crew Last 90 Days 4 Flight Crew Total 7 Flight Crew Type 7
Events
Anomaly	Airspace Violation All Types Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

Conducted a 4 minute flight for a roof inspection. I misinterpreted uas facility map data and conducted flight in class B airspace of iad. Violation was discovered during monthly flight reviews by my company's drone department. I thought the number listed in the facility map grid box indicated the floor of the overlying controlled airspace. I know better now.

Original NASA ASRS Text

Title: UAV operator reported conducting a flight within IAD Class B airspace because he misread the chart.

Narrative: Conducted a 4 minute flight for a roof inspection. I misinterpreted UAS facility map data and conducted flight in Class B airspace of IAD. Violation was discovered during monthly flight reviews by my company's drone department. I thought the number listed in the facility map grid box indicated the floor of the overlying controlled airspace. I know better now.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.