| Source Year | 2014 |
|---|---|
| Category | Ortho |
| Feature Type | Imagery |
| Methodology | First Base Solutions created a digital 12cm resolution colour orthophoto mosaic of every 60% FOL photograph using the adjusted digital images, ground control data and a digital elevation model. Correcting the distortion found in the original imagery creates the orthophoto. There are three distortions, camera lens distortion, changes in aircraft altitude and changing ground elevation. Processing of the orthoimagery is done by using a combination of PCI and Intergraph software. Once the adjusted image orientation data is imported, the remaining data required to produce the orthophoto is input. This includes the camera calibration data, control data and the digital elevation model. The number of times the imagery is subject to re-sampling is minimized. The re-sampling algorithms used employs cubic convolution strategies for deriving the output pixel intensity value. Once the individual images have been orthorecified they are imported into the Intergraph OrthoPro mosaicing environment. Intergraph produces remarkable mosaics with virtually invisible seams and remarkably even tone. Initial tiles are clipped from within Intergraph and then mosaiced together using MrSID for QC evaluation. Visual QC checks are done to look for wobbles along road/railways and bridges, even colour tones, poor cutline location and incorrect elevations. Once corrections are complete the final tiles are clipped using PCI and final delivery tiles are processed. |
| Geographic Extent | City of Kitchener |
| Spatial Projection | NAD83 UTM Zone 17N (EPSG: 26917) |
| Acquistion Period | May |
|---|---|
| Horizontal Datum | North American Datum 1983 (EPSG: 6269) |
| Vertical Datum | Not Applicable |
| Horizontal Accuracy | 8 cm RMSE |
| Vertical Accuracy | Not Applicable |
| Grid Resolution | 12 cm |
| Spectral Bands | RBG (3-bands) |
| Point Density | |
| File Format | Geotiff |
| Use Constraint | Open Data |
|---|---|
| Agency Originator | Multiple Agencies |
| Agency Distributor | City of Kitchener |
| Process Description | Ortho-photo mosaic from tiles |
| Flying Height Above Ground (m) | NA |
| Spatial Area (km2) | 222 |
| Spatial Resolution (cm) | 12 |
| Producer | First Base Solutions Inc. |
| System | |
| Owner | City of Kitchener |
| Open Data | https://open-kitchenergis.opendata.arcgis.com/documents/62b7db80f81742dba0905b90929cc568/about |
|---|---|
| Contact | Manager Geospatial Data and Analytics, City of Kitchener |
| Citation | Orthoimagery 2014 (May - 12 cm) Spectral Bands RBG (3-bands), Horizontal Accuracy: 8 cm RMSE (First Base Solutions Inc. for City of Kitchener) NAD83 UTM Zone 17N (EPSG: 26917) |
|---|
