Snabb’s vfio backend was removed because of the high maintenance burden and low usage. DPDK also offers a vfio backend and has historically supported running with unprivileged users, but recent versions no longer support this with most drivers. No NOTAMs Notice to Airmen are issued for various reasons and can affect the flying of a survey on a particular day. Of the investigated other frameworks only netmap supports this.Aircraft availability Delays in capture for one region can cause flow-on effects for other regions as aircraft wait for conditions to improve sufficiently to perform a successful survey.Our systems are designed to handle a certain level of turbulence, but there can be a point where it is unsafe to fly or it is beyond the capability of our camera system to handle. Only the following NIC families currently have netmap support in FreeBSD and hence pfSense: em, igb, ixgb, ixl, lem, re or cxgbe. Low Turbulence Some conditions are not visible from the ground, and turbulence at altitude can be one of these. The new Inline IPS Mode of Snort will only work on interfaces running on a supported network interface card (NIC).If ATC denies clearance, then we do our best to find an alternate area to work on, but,sometimes this can bring us to a halt. Air Traffic Control clearance Some areas require the pilots to get approval to enter the airspace.No ground obstructions No snow or standing water should be present, as it reduces the interpretability of the features underneath.Good visibility No fog, haze, or smoke obscuring land features.It's basically crippling my ability to have reliable IDS, because I'm not interested in moving forward using the legacy method. This window of collection varies depending on latitude and season there are some places where the sun never makes it above 30 degrees for large portions of the year. I've seen quite a few posts, dating back to 2018, where Netmap has been 'in progress' and, as quickly as they start, that's where they end. The Linux kernel configuration item CONFIGNETFILTERXTTARGETNETMAP. We aim to collect when the sun is over 30 degrees above the horizon. CONFIGNETFILTERXTTARGETNETMAP: NETMAP target support. Good sun angle Higher sun angles reduce shadowing.Clear Skies No low overcast clouds or unavoidable clouds obscuring land features.Fail to meet one condition, and the survey cannot be taken. These altitudes are part of how we capture Nearmap imagery at such a large and global scale however, this also means that many conditions need to align before a survey can be completed successfully. We take photos from moving airplanes up to 18,000 feet above the ground (that's 5.5 km, or 3.4 miles) and capture imagery down to a resolution of 5.8cm (2.3"). If we haven't captured an area that was due for a capture, it’s usually because all prerequisites for a successful survey were not met.