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Returnable Documents:

• The document states that returnable documents are required, but does not specify what they are.

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No dates are stated in the available document excerpt. The closing date is recorded in the tender listing (2026-05-22 at 11:00). Briefing session dates, site visits, or clarification deadlines are not specified in this document.

No contact details are provided in the available document excerpt. SCM or technical contact names, email addresses, phone numbers, and physical submission addresses are not stated in this document.

Returnable Documents: Specific required documents are not detailed in the available document excerpt. The document provided (Appendix B - TrigNet Distribution Map) does not contain submission requirements, forms, or returnables. Bidders should obtain the complete tender documentation to confirm submission requirements.

Evaluation criteria are not detailed in the available document excerpt. The document only contains a reference to 'TrigNet Stations 2019' which may indicate a requirement for geodetic control points or familiarity with the TrigNet reference network. Specific scoring methodology, minimum thresholds, and preference point allocations are not stated in this excerpt.

Scope: Supply of 0.25 metre Ground Sample Distance (GSD) digital colour aerial imagery. Location: Oudtshoorn, Western Cape. Client: Chief Directorate: National Geospatial Information. The document references TrigNet Stations (2019), suggesting potential requirements for ground control points using the TrigNet reference network. Specific deliverables, quality standards, file formats, and service levels are not detailed in this excerpt.

Pricing format, payment terms, required bonds or guarantees, and financial capacity requirements are not stated in the available document excerpt.

Compliance requirements are not detailed in the available document excerpt. The document contains insufficient searchable text to extract B-BBEE, tax clearance, CSD registration, CIDB, CIPC, professional registration, or local content requirements.

• Standard for Acquisition of Digital Aerial Imagery (v7) effective date: 7 March 2022.
• Report approval date: 2 February 2023.

• Organization: Chief Directorate: National Geospatial Information (CD: NGI), Department of Agriculture, Land Reform & Rural Development.
• Address: Private Bag X10, Mowbray, 7705; Van der Sterr Building, Rhodes Avenue, Mowbray, 7705.
• Tel: 021 658 4300.
• Fax: 021 658 4357.
• Technical contacts: Mr Mbuyiselo Mbewana (Control Survey Technician), Mr Aslam Parker.

Eligibility depends on passing an operational test as per the 'Standard for the Acquisition of Digital Aerial Imagery (v7, 7 March 2022)'. Requirements:

• Sensor system must be certified and meet CD: NGI specifications.
• Operational test must be conducted on a CD: NGI-approved test area before main acquisition.
• Test must demonstrate the system’s ability to deliver imagery meeting CD: NGI’s accuracy and quality standards for photogrammetry and orthorectification.
• Failure to meet test standards may result in disqualification of the sensor system.

Scope: Supply 0.25m Ground Sample Distance (GSD) digital colour aerial imagery for Oudtshoorn.

Mandatory Requirements:

• Use only digital sensor systems compliant with the 'Standard for the Acquisition of Digital Aerial Imagery (v7, 7 March 2022)'.
• Conduct an operational test on a CD: NGI-approved test area before main imagery acquisition, especially after any camera or IMU disturbance.

Operational Test Specifications:

• Fly at 0.25m GSD using the same aircraft/sensor/peripheral equipment planned for the main programme.
• Imagery must include at least two adjacent strips with:
• Forward overlap: 55%–65%.
• Sidelap: 20%–30%.
• Tie strips to connect east-west strips.
• Orthorectified imagery must cover at least 15 minutes (5 sheets) East-West and 6 minutes (2 sheets) North-South, unless otherwise specified.
• Entire test area must have stereoscopic coverage.

Accuracy Standards (after aerial triangulation, 2σ confidence):

• Ground Control Points (GCPs): ±0.068m max error in easting/northing (absolute max ±0.10m).
• Height: ±0.12m max error (absolute max ±0.30m).

Test Area Requirements:

• Must be approved by CD: NGI prior to testing.
• Must include at least four surveyed Photo Ground Control (PGC) points, one in each corner of the block.
• Should feature diverse terrain: built-up areas, undulating/steep slopes, water bodies, roads, cultivated/vegetated areas, and natural features.

Documentation to Submit:

• Plan of the test area.
• Coordinates, height, and description of each GCP.
• Enlargements marking GCPs clearly for easy identification.
• All additional information as stipulated in the standard.

Pre-Approved Test Areas (examples):

• Hartebeestpoort Dam (North West).
• Franschoek (Western Cape).
• Queenstown (Eastern Cape).

Note: Failure to meet test standards may result in prohibition of the sensor system for CD: NGI use.

Submit all returnable documents as specified in the tender. Failure to include required returnables may result in disqualification.

Evaluation likely based on: proven experience in aerial surveying, possession of appropriate equipment, and relevant certifications. Exact scoring method and thresholds are not specified.

Supply 0.25m Ground Sample Distance (GSD) digital colour aerial imagery for Oudtshoorn. The area of capture is defined by the following grid coordinates: 3119-3125, 3219-3225, 3319-3325, 3419-3425.

Required returnable documents: Not explicitly listed in the provided text. Ensure all deliverables (GNNS_INS, camera, project, model, photo files) are submitted in the specified formats and archived per job as per ITIS standard.

Eligibility inferred from technical capability: Must demonstrate expertise in aerial survey, GNSS/INS integration, photogrammetry, and strict compliance with ITIS standard for data archiving and file formats. No explicit scoring method or thresholds provided.

Scope: Supply 0.25m Ground Sample Distance (GSD) digital colour aerial imagery for Oudtshoorn. Deliverables: Five mandatory file types, each with specific content and format requirements: - GNNS_INS file: Image positioning, camera-GNNS/INS integration, boresight calibration, image ID, 3D coordinates, exterior orientations, timestamps, exposure dates. Must conform to sample_GNNS_INS_DATA.TXT. - Camera file: Parameter settings for stereo model setup in Digital Photogrammetric Workstation (DPW). Must conform to sample_camera.txt. - Project file: Parameters for DPW and aerial triangulation. Must conform to sample_project.txt. - Model file: Model sequence identification for the entire job. Must conform to sample_model.txt. - Photo file: Photo parameters for every image in the area of interest (AOI). Must conform to sample_photo.txt. All files must be archived per job as per ITIS standard logical file structure.

• All strips of an entire job must be flown within one month of commencement unless prior written permission is obtained from the Chief Director.

• Address for amendment requests or comments: Chief Director: National Geo-spatial Information, Private Bag X10, Mowbray, 7705.

• Submit all deliverables on a clearly labelled portable hard drive (project name, collection dates, contractor name, disk/package contents).
• Include an 'Inventory.txt' file in the root directory listing all contents of the hard drive.
• Retain a copy of all submitted data until written acceptance is received from the Chief Directorate: National Geo-spatial Information (CD: NGI).
• Mandatory returnable documents:
• Delivery note (A4, company letterhead, business address, contact details, job number, bid reference, job area name, dates of imagery/award/delivery, executive summary, noteworthy issues, and list of deliverables including digital media details and folder structure).
• Survey Report (digital, A4, company details, job/bid reference, executive summary, positioning methods/equipment, TrigNet base stations, air-station coordinate computation, positional accuracies, exposure frequency, trajectory schematics, dataset descriptions, rejected/refown strips, processing results, and exterior orientation parameters).
• Imagery Post-Processing Report (digital and hard copy, A4, company details, job/bid reference, processing date, executive summary, radiometric/geometric processing overviews, pan-sharpening details, output options for RGB/CIR, and noteworthy issues).
• Operations Report (A4, company details, job/bid reference, required GSD, equipment manifest, camera details, job imagery information table, and authorised signature).
• Flight Index (A4, company details, job/bid reference, strip/image range, date, GSD, flight direction, and remarks).
• Certificate of Lens/Camera Non-Disturbance (affidavit, A4, company details, job/bid reference, camera/lens details, statement of non-disturbance, last calibration date, and authorised signature).
• Required data files: Raw imagery, processed imagery (radiometrically/geometrically corrected), GNSS/IMU data (including RINEX), PDF flight plans, mission planning data, and ASCII files (GNSS/INS data, panel info).
• Follow the folder structure specified by CD: NGI.

• Contractor must possess and operate a compliant large-format digital aerial sensor system meeting all technical specifications outlined in the standard.
• Camera requirements:
• No Bayer pattern filtering; separate CCD/CMOS channels for each spectral band (PAN, Red, Green, Blue, NIR) are mandatory.
• Must support simultaneous capture of panchromatic and at least four multispectral bands (RGB, NIR).
• Minimum 12-bit radiometric resolution per band.
• Geometric accuracy: calibrated pixel coordinates within 25% of pixel size; true rectangularity maintained within 25% of pixel size.
• Aircraft and integrated systems:
• Must include integrated GNSS/INS with post-processed IMU accuracy: roll/pitch ≤20" arc, heading ≤30" arc.
• GNSS antenna must be IGS-approved, support GPS/GLONASS, and be installed per Civil Aviation Authority (CAA) requirements.
• GNSS PDOP and VDOP must be <3 during imagery acquisition.
• Personnel requirements:
• A geomatics practitioner registered with the South African Geomatics Council (SAGC) must survey the IMU-to-GNSS antenna and sensor lever arms.
• Pre-approval requirements:
• Submit calibration certificates (geometric and radiometric) for the sensor system, including focal length, lens distortion, and principal point details.
• Conduct and submit results of a boresight calibration and operational test (flown at 0.25m GSD or as specified) for CD: NGI approval prior to project commencement.
• Operational test must meet aerial triangulation accuracy standards: ±0.068m (easting/northing) and ±0.12m (height) at 2σ confidence.
• Disqualification risks: Failure to meet sensor specifications, calibration, or operational test standards may result in rejection of the sensor or imagery.

• Scope: Supply 0.25m Ground Sample Distance (GSD) digital colour aerial imagery for Oudtshoorn.
• Sensor system requirements:
• Large-format digital photogrammetric camera with single robust frame for geometric integrity.
• True nadir configuration; oblique cameras or virtual imagery requiring upsampling are non-compliant.
• Minimum spatial resolution: capable of capturing ≤5cm GSD.
• Must support simultaneous capture of panchromatic and multispectral bands (RGB, NIR) with minimal spectral overlap.
• Separate CCD/CMOS channels for each band; Bayer pattern filtering is prohibited.
• Lens distortion: radial ≤0.010mm (wide-angle), asymmetry ≤0.005mm, tangential ≤0.005mm.
• Footprint coverage must suit CD: NGI operational purposes.
• Flight operations:
• Nominal GSD: 0.25m with ≤10% variation (lower GSD not to exceed 10% in extreme terrain).
• Forward overlap: average 60% (minimum 55%).
• Sidelap: average 25% (range 15-40%); compensate for terrain variations with auxiliary strips if needed.
• Flight lines: must be straight and parallel with ≤5% deviation from planned line; first/last two images per strip must fall outside the area.
• Tilt: ≤±5° per image; average tilt for project ≤±1°.
• Crab: camera must compensate for aircraft crabbing; error ≤±5° from average line of flight; differential between successive exposures ≤±5°.
• Course correction: ≤3° between successive images.
• Solar altitude: ≥30° (average terrain) or ≥40° (mountainous terrain); time of day must be approved by Chief Director.
• Flying height: determined by terrain; deviation ≤10% above mean terrain without prior approval.
• Strips must be flown in full without interruption; rejected strips or breaks require re-flying at a similar time of day.
• All strips for a job must be flown within one month unless prior written permission is granted.
• GNSS/IMU requirements:
• Integrated GNSS (GPS/GLONASS) and INS system required for exterior orientation data.
• GNSS antenna must be co-located and surveyed to the image centre by a SAGC-registered geomatics practitioner.
• IMU must be rigidly attached to the imaging focal plane; gyro-stabilised mount must use IMU orientation data.
• GNSS data collection: ≥30 minutes pre-flight for ambiguity resolution; PDOP/VDOP <3 during acquisition.
• Loss of GNSS lock during acquisition requires aborting the strip and re-initialising baselines.
• Image quality:
• Free from clouds, cloud shadows, smoke, haze, light streaks, excessive snow, and blemishes.
• High, thin clouds permitted if they do not reduce ground detail visibility or light levels.
• No image smearing, blurring, ghosting, or missing pixels.
• Colour bleeding must not be detrimental; contrast and tonal values must be consistent across the project.
• Radiometric consistency required across the project area; dodging/colour balancing only with written Chief Director approval.
• Processing requirements:
• Radiometric correction: compensate for temperature, aperture, or other radiometric factors.
• Geometric correction: correct for lens distortion and tilt.
• Output format: TIFF with JPEG compression (Q=3), tiled, with full overviews.
• Image orientation: must correspond to IMU data (e.g., North-up for West-East flight direction).
• Deliverables:
• Raw and processed imagery (radiometrically/geometrically corrected).
• GNSS/IMU data (RINEX format and ASCII files with position/orientation parameters).
• Flight plans (PDF), mission planning data.
• Multiple reports (Survey, Imagery Post-Processing, Operations, Flight Index, Certificate of Non-Disturbance).
• ASCII files: job number, degree squares, area, date, scale, camera/lens details, and panel info (strip/image data, timestamps, coordinates).

• Contractors must acquire digital aerial imagery strictly according to the 'Standard for the Acquisition of Digital Aerial Imagery' (QLAS.SD.2_DIM v7) as mandated by the Land Survey Act.
• Sensor systems must be pre-approved by CD: NGI based on calibration and operational test results.
• Use of a geomatics practitioner registered with the South African Geomatics Council (SAGC) is mandatory for surveying IMU-to-GNSS/sensor lever arms.
• No specific B-BBEE, CIDB, CSD, tax, or CIPC requirements are stated in the document.

For queries or amendments related to this standard: - Chief Director: National Geo-spatial Information. - Postal address: Private Bag X 10, Mowbray, 7705. - Reference all correspondence as: 'Amendment- Standard for Image Exterior Orientation'.

Eligibility and scoring focus on demonstrated capability to perform aerial triangulation and deliver outputs in strict compliance with the technical specifications. Key points: - Must prove ability to work with imagery, camera calibration certificates, INS data, and Photo Ground Control Points (PGC) as specified. - Compliance with the Standard for the Acquisition of Digital Imagery and the Standard for the National Control Survey Network (NCSN) is mandatory. - Familiarity with South Africa’s NCSN and referenced standards (e.g., Geospatial Reference Frame) is implied. - Outputs must meet accuracy thresholds (e.g., ≤10 microns for photogrammetric precision, ≤1.5m horizontal and ≤1.8m vertical for PCPs at 95% confidence).

Scope: Supply of 0.25m Ground Sample Distance (GSD) digital colour aerial imagery for Oudtshoorn, with aerial triangulation to produce exterior orientation parameters for national mapping. Key requirements: - Aerial triangulation method: Bundle adjustment with self-calibration and GNSS/INS-assisted processing. - Photo Control Points (PCPs): Minimum of six per model and nine per image. - Height check points: Maximum of five trigonometrical beacons per 1:50,000 sheet area, evenly distributed. - PGC points: Absolute accuracy of ≤0.30m in position and elevation, fixed relative to the NCSN. - Outputs: Final adjusted PCP coordinates (y, x, H) on the South African coordinate system, displayed to one decimal place of a metre. Exterior orientation (EO) parameters (Omega, Phi, Kappa) displayed to six decimal places of a degree. Aerial Triangulation Plan (ATP) with specified content (e.g., job name, area, scale, camera details, GSD, date of imagery). - Accuracy thresholds: Photogrammetric measuring precision ≤10 microns. Horizontal accuracy of adjusted PCPs ≤1.5m at 95% confidence. Vertical accuracy of adjusted PCPs and check points ≤1.8m at 95% confidence. - Compliance: Must adhere to the Standard for the Acquisition of Digital Imagery and the Standard for the National Control Survey Network.

Chief Directorate: National Geospatial Information

• Address: Private Bag X10, Mowbray, 7705
• Tel: 021 658 4300
• Fax: 021 658 4357

Refer to the main tender document for submission address, deadline, and required returnable forms. This excerpt does not specify submission guidelines.

Technical evaluation focuses on visual quality and consistency of the 0.25m GSD aerial imagery. Criteria include: Terrain Detail (sharpness, clarity of structures, trees, farmland), Contrast (dynamic range, no clipping of highlights/shadows), Colour (true representation of terrain), Tonal Balance (consistent highlights, shadows, midtones), Lens Flare (no scattering or rainbow effects), Shadow Density (detail in shadow areas), Shadow Length (must not obstruct topographical detail), Artefacts (no hotspots, clouds, or cloud shadows). Imagery must be deemed acceptable for NGI requirements. Full eligibility and scoring criteria are in the complete tender package.

Scope: Supply 0.25m Ground Sample Distance (GSD) digital colour aerial imagery for Oudtshoorn.

Deliverables: Aerial imagery test area at 0.25m GSD.

Quality Standards: Imagery must meet visual quality and consistency criteria, including terrain detail, contrast, colour accuracy, tonal balance, absence of lens flare, shadow density/length, and no artefacts (hotspots, clouds, cloud shadows). Final imagery must be acceptable for National Geospatial Information (NGI) requirements.

Evaluation is based on compliance with Aerial Triangulation & Elevation Capture (ATEC) criteria. Key points: - Mandatory files and data formats must be provided: camera specifications, GNSS/INS data, model sequences, project parameters, and photo exterior files. - Successful identification and measurement of ground features (PGCs) with full autocorrelation. - Final PhotoT Absolute computation must meet maximum ground residual limits (see Appendix E). - Elevation capture must demonstrate: good ground surface identification, excellent stereoscopic results, no parallax or lateral shifts, seamless panning. - Imagery must be suitable for DTM validation, including successful postings correlation and true-to-ground accuracy. - ATEC unit manager must sign the report to confirm assessment accuracy.

Supply 0.25m Ground Sample Distance digital colour aerial imagery in Oudtshoorn. Requirements: - Seamless integration with Aerial Triangulation Software. - Provision of all mandatory files and data formats (camera specs, GNSS/INS data, model sequences, project parameters, photo exteriors). - Capture and process elevation data for river courses and ridges with good ground surface identification. - Imagery must enable: excellent stereoscopic results, no parallax or lateral shifts, seamless panning. - Suitability for Digital Terrain Model (DTM) validation, including successful postings correlation and true-to-ground accuracy.