Hamilton 0.1m Urban Aerial Photos (2015)
Orthophotography in the Hamilton City Council area taken in March 2015. Coverage is of the Hamilton City urban area.
Imagery was captured for the ‘Hamilton City Council’ by Aerial Surveys Ltd, Unit A1, 8 Saturn Place, Albany,0632, New Zealand.
Data comprises:
•492 ortho-rectified RGB GeoTIFF images in NZTM projection, tiled into the LINZ Standard 1:1,000 tile layout
•Tile layout in NZTM projection containing relevant information.
The supplied imagery is in terms of New Zealand Transverse Mercator (NZTM) map projection. The products are tiled into NZTopo50 1:1,000 tiles. Please refer to the supplied tile layout shape file for specific details, naming conventions, etc.
Imagery supplied as 10cm pixel resolution (0.1m GSD), 3-band (RGB) uncompressed GeoTIFF. The final spatial accuracy is ±0.2m @ 95% confidence level in clear open spaces (2 sigma).
Index tiles for this dataset are available as layer [Hamilton 0.1m Urban Aerial Photos Index Tiles (2015)]( http://data.linz.govt.nz/layer/336 5)
Simple
Identification info
- Date (Creation)
- 2015
- Status
- Completed
- Point of contact
-
Role Organisation Electronic mail address Point of contact LINZ - Land Information New Zealand
- Spatial representation type
- Grid
Spatial resolution
Equivalent scale
- Denominator
- 1000
- Topic category
-
- Imagery base maps earth cover
Extent
))
Resource format
- Title
-
*.xml
- Date
- Edition
-
Unknown
Resource constraints
- Classification
- Unclassified
Resource constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Access constraints
- Copyright
Resource constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Access constraints
- License
Resource constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Use constraints
- Copyright
Resource constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Use constraints
- License
- Language
- English
- Character encoding
- UTF8
Resource lineage
- Statement
-
Data Acquisition:
The aerial photography for this project was captured on 20 March 2015.
All photography was captured using Vexcel's digital UCLp camera and flown at 3850ft (1173m) flying height.
Data Processing:
All aspects of the data processing from imagery processing to DTM creation and ortho production
and product deliverables was unadertaken in-house by Aerial Surveys staff.
Map Projection:
All spatial data for this project provided in terms of New Zealand Transverse Mercator 2000 map
projection (NZTM2000) . The datum is New Zealand Geodetic Datum 2000 (NZGD2000). The height
datum is orthometric Auckland 1946 (sea level). The products are tiled into NZTopo50 map sheet
tiles as noted below.
Image Processing and Aerial Triangulation:
All imagery has gone through QA checks ensuring there is no cloud cover and cloud shadow. During
aerial acquisition the aircraft on-board GPS navigation data and ground base station data collected
and post processed. Imagery processed to Level 3 and checked for colour correctness/radiometry
and even tonal balance across each project area. The aerial triangulation brings together the GPS
data and imagery using a two part process which stitches the imagery together using tie point
matching for the relative orientation phase and observing ground control points for the absolute
orientation phase. A final report is generated to check RMSE values are within specification.
DTM Source:
The digital terrain model used for this project was derived from 2008 and 2010 LiDAR
DTM data. Outside the existing data we have collected a new DTM from the stereo imagery. The
DTM data is merged together seamlessly and accuracy is checked to meet the ortho imagery
specification.
RGB and Ortho Rectification Process:
Ortho rectification is the process of removing (from the image) the effects of camera tip/tilt and
displacement caused by terrain relief. During this process each frame is 'draped' over the terrain
model and the photograph then becomes 'scaled' and 'levelled' in terms of true ground coordinates.
The generation of seamlines between frames follow natural physical features such as ridges, valleys,
roads and rivers. The seamlines are used for the final ortho mosaic that stitches the imagery
together using feather mosaicking techniques. The ortho imagery is then extracted aligned to LINZ
1:1000 sheet tile layout.
Spatial Accuracy: ±0.2m @ 95% confidence level in clear open spaces (2 sigma)
- Hierarchy level
- Dataset
- Other
-
dataset
Reference System Information
- Reference system identifier
- 2193
Metadata constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Access constraints
- Copyright
Metadata constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Access constraints
- License
Metadata constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Use constraints
- Copyright
Metadata constraints
- Use limitation
-
Released under Creative Commons By
Creative Commons Attribution 3.0 New Zealand
Link: http://data.linz.govt.nz/license/attribution-3-0-new-zealand/
Attribution Required for Copies:
"Copyright in this work is owned by Hamilton City Council"
Attribution Required for Derivative works:
"Copyright in the underlying dataset from which this work has been derived is owned by Hamilton City Council"
- Use constraints
- License
Metadata
- Metadata identifier
- 05bdec93-647d-d9c0-2135-f6bd5873fa5f
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation Electronic mail address Point of contact LINZ - Land Information New Zealand
Type of resource
- Resource type
- Dataset
- Name
-
dataset
- Date info (Revision)
- 2016-05-16
Metadata standard
- Title
-
ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata
- Edition
-
1.1