Lýsigagnagátt
Loftmyndasafn LMÍ - uppréttar myndir frá 1974, 1994 - 2000 / LMÍ aerial photos from 1974, 1994 - 2000
Samsettar og uppréttar sögulegar loftmyndir af Íslandi. Unnið er að því að staðsetja loftmyndir frá 1974 og 1994 – 2000 úr loftmyndasafni Landmælinga Íslands (https://gatt.lmi.is/geonetwork/srv/ice/catalog.search#/metadata/d2323e18-ab9f-495d-8a4e-58c2a5fb096e ). Myndirnar eru birtar jafnóðum og búið er að staðsetja þær en ætlunin er að staðsetja eldri myndir síðar. Svæði af myndum sem teknar voru í sama flugi og úr sömu flughæð eru sett saman. Upplausn myndanna er yfirleitt 50 cm.
Búið er að vinna myndirnar með sjálfvirkum aðferðum. Ákveðnar staðsetningar eru valdar af gervitunglamyndum (https://gatt.lmi.is/geonetwork/srv/ice/catalog.search#/metadata/e542c260-6431-48a5-8065-93350b8cb3a1) og stilltar af á ÍslandsDEM landhæðalíkaninu (https://gatt.lmi.is/geonetwork/srv/ice/catalog.search#/metadata/e6712430-a63c-4ae5-9158-c89d16da6361 ). Gerð eru nákvæm landhæðalíkön úr sögulegu loftmyndunum þar sem hæðarnákvæmni er yfirleitt innan við 1 m. Líkönin eru síðan notuð til að staðsetja loftmyndirnar. Áætluð staðsetningarnákvæmni myndanna er minna en 2 m.
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This repository includes orthorectified and mosaicked historical aerial images from all over Iceland. The datasets are created from historical aerial images on film from the years 1974, 1994 - 2000 from the aerial photograph collection of the NLSI (https://gatt.lmi.is/geonetwork/srv/ice/catalog.search#/metadata/d2323e18-ab9f-495d-8a4e-58c2a5fb096e). Each mosaic is created from images taken on the same day at approximately the same height. The resolution of the mosaics is usually 50 cm.
The historical photographs have been processed using automated methods of detection of points of interest (control points?) using the Maxar mosaic (https://gatt.lmi.is/geonetwork/srv/ice/catalog.search#/metadata/e542c260-6431-48a5-8065-93350b8cb3a1)) followed by a refined correction of the cameras using the IslandsDEM (https://gatt.lmi.is/geonetwork/srv/ice/catalog.search#/metadata/e6712430-a63c-4ae5-9158-c89d16da6361) as reference. For each block of historical photographs, an accurate Digital Elevation Model (DEM) is created (where the vertical accuracy is typically better than 1 m), which is used to orthorectify the aerial photographs. The estimated horizontal accuracy of the orthorectified aerial imagery is better than 2 meters.
Simple
- Date ( Publication )
- 2022-11-25T10:25:00
- Status
- On going
- Maintenance and update frequency
- Continual
- Keywords ( Theme )
-
- loftmyndasafn
- loftmyndir
- aerial photographs
- orthorectified
- open data
- GSL
- Keywords ( Place )
-
- World
- Access constraints
- Other restrictions
- Other constraints
- no limitations to public access
- Use constraints
- Other restrictions
- Other constraints
- Attribution 4.0 International (CC BY 4.0)
- Denominator
- 36000
- Metadata language
- ice
- Character set
- UTF8
- Topic category
-
- Imagery base maps earth cover
- Begin date
- 1937-07-01
- End date
- 2000-09-09
))
- Reference system identifier
- EPSG:3057 (ISN93)
- Number of dimensions
- 2
- Dimension name
- Row
- Dimension name
- Column
- Dimension size
- 1
- Dimension name
- Vertical
- Dimension size
- 1
- Resolution
- 50 cm
- Cell geometry
- Area
- OnLine resource
- https://gis.lmi.is/mapcache/loftmyndasafn/isn93/wms?service=wms&request=getcapabilities ( OGC:WMS )
- OnLine resource
- Heimasíða Landmælinga Íslands ( WWW:LINK-1.0-http--link )
- OnLine resource
- Loftmyndasjá ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
- Statement
- 1. útgáfa myndir frá 1994 - 2000
gmd:MD_Metadata
- File identifier
- 4fd787a1-5f3f-43ab-8d23-280ecbe6a3fb XML
- Metadata language
- en
- Character set
- UTF8
- Parent identifier
- Loftmyndasafn LMÍ d2323e18-ab9f-495d-8a4e-58c2a5fb096e
- Date stamp
- 2023-09-05T11:45:54
- Metadata standard name
- ISO 19115:2003/19139
- Metadata standard version
- 1.0
Overviews
Spatial extent
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