Airspace designated for hazardous military activities, such as live weapons training. All aircraft not associated with these activities are restricted from entry. This layer is a member of the "Military" feature dataset, which contains layers related to military installations and flight training areas in the state of Maryland. Data source: Military Aviation and Installation Assurance Siting Clearinghouse website (https://www.acq.osd.mil/dodsc/about/maps.html) Last updated: 2020. Recommended data update schedule: yearly Contacts sources: websites for the military installation to which each restricted area belongs. Recommended to check for updates when checking for new restricted area data, approximately yearly.

The dataset provides information on airport approach surfaces. The approach surface is longitudinally centered on the extended runway centerline and extends outward and upward from each end of the primary surface. An approach surface is applied to the end of each runway based upon the type of approach available. (Slopes can vary from 20:1, 34:1, 40:1 or 50:1).

The dataset provides information on the primary surfaces of Iowa airports. The primary surface extends 200 feet beyond each end of the runway, but when the runway has no specially prepared hard surface, the surface ends at the end of that runway.

Aerial corridors in which military aircraft are permitted to fly faster than 250 knots (about 285 mph) and under 10,000 ft. Routes are divided into visual rules (VR) and instrument rules (IR, at night and in poor weather conditions). This layer contains military training routes (MTR) with a floor elevation of up to and including 500 ft. This layer is a member of the "Military" feature dataset, which contains layers related to military installations and flight training areas in the state of Maryland. Data source: Military Aviation and Installation Assurance Siting Clearinghouse website (https://www.acq.osd.mil/dodsc/about/maps.html) Last updated: between 8/15/2019 and 9/11/2019 (Cycle 1909) Recommended data update schedule: yearly Contacts sources: websites for the military installation to which each MTR belongs. Recommended to check for updates when checking for new MTR data, approximately yearly. Feature Link: https://mdgeodata.md.gov/imap/rest/services/Military/MD_Military_SmartDG/MapServer/13

This dataset provides information on the transitional surfaces of Iowa airports. The transitional surface extends outward and upward at right angles to the primary and approach surfaces at a slope of 7:1.

Aerial corridors in which military aircraft are permitted to fly faster than 250 knots (about 285 mph) and under 10,000 ft. Routes are divided into visual rules (VR) and instrument rules (IR, at night and in poor weather conditions). This layer contains military training routes (MTR) with a floor elevation of up to and including 500 ft. This layer is a member of the "Military" feature dataset, which contains layers related to military installations and flight training areas in the state of Maryland.,Data source: Military Aviation and Installation Assurance Siting Clearinghouse website (https://www.acq.osd.mil/dodsc/about/maps.html),Last updated: between 8/15/2019 and 9/11/2019 (Cycle 1909),Recommended data update schedule: yearly,Contacts sources: websites for the military installation to which each MTR belongs. Recommended to check for updates when checking for new MTR data, approximately yearly.

This dataset provides information on the transitional surfaces of Iowa airports. The transitional surface extends outward and upward at right angles to the primary and approach surfaces at a slope of 7:1.

The dataset provides information on the horizontal surfaces of Iowa airports. The horizontal surface is a plane 150’ above the established airport elevation. The perimeter of which is constructed by swinging arcs of specified radii from the center of each end of the primary surface and connecting adjacent arcs by lines tangent to those arcs.