Minimum technical standards for this kind of work are covered in detail by the landscape Institutes latest guidelines and it is sufficient to say that my process comfortably exceeds them.

Working methods are based upon the need for the verifiability of the process which requires that the procedure can be successfully reproduced by another party. Critical to this is the ability to record the exact camera position which is the only parameter that determines the relative size and position of objects in a 3D world as projected on to the 2D sensor in a photograph.

Equipment
The system records sufficient detail to reproduce in print that which can be observed with the naked eye from the camera position. Lenses typically used cover the horizontal field of view from 74-40 degrees and are shift designs which maintain 2 point perspective during vertical framing adjustment.

Photography
The camera is mounted on a tripod at eye level and leveled with respect to the horizon to < 30mm per 100m*
The camera can also be rotated around the survey point axis while maintaining a constant camera coordinate to capture both panoramic and adjacent rectilinear ( LVMF guideline) images. Furthermore the rotation system is able to maintain a consistent horizontal setting within the stated tolerance so that each individual image plate in a panorama can be individually verified or aligned to if required.
Supplementary digital photographs record the vertical and lateral position in relation to the survey point to < 2mm in each axis. More general photographs record the positions of the camera in the scene as both a guide for the survey team and for inclusion in final documentation.
Images are captured in native camera RAW format and focusing distances and apertures are selected to ensure all points in the view are rendered in focus.

Post production
RAW camera files have their tonal and colour values optimised to honestly reflect the visual qualities of the scene as experienced by the photographer at the time of capture are processed into a universally accessible RGB lossless tiff format. The image is then remapped to remove any optical distortion that would cause the geometry of the photograph to deviate from an accurate geometrical projection of the scene from the camera coordinate. It is then placed in a pre-prepared template where the center of the optical axis is aligned with the templates center to account for any offset used in vertical farming adjustments or manufacturing tolerance misalignment of the optical axis and that of the sensors center . Camera, lens and image technical parameters necessary for alignment with a virtual camera are included in a text layer;
Lens focal length, sensor size , time and date of photograph and canvas size of the image 'canvas size' in pixels.
A more detailed methodology specific to each commission is always available for inclusion in final planning documentation.

*This is achieved using a precision spirit level which results in the camera pointing to the astronomical horizon which lies above the visible horizon due both to the curvature of the earth and refraction of light through the atmosphere. Where long distance viewpoints are undertaken the end user must take this offset into account according to standard formulas.