Loftmyndasafn LMÍ - uppréttar myndir

Samsettar og uppréttar sögulegar loftmyndir af Íslandi. Unnið er að því að staðsetja loftmyndir frá 1994 – 2000 úr loftmyndasafni Landmælinga Íslands (https://gatt.lmi.is/geonetwork/srv/ice/catalog.search#/metadata/d2323e18-ab9f-495d-8a4e-58c2a5fb096e ). Myndir 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 IslandsDEM 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.

----------------------------------------------------------------------------------------------------------------

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 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
Originator
Landmælingar Íslands - Þjónustufulltrúi ( )
Maintenance and update frequency
Continual
Keywords ( Theme )
  • Loftmyndasafn
  • Aerial photographs
  • orthorectified
  • GSL
Keywords ( Place )
  • World
Access constraints
Copyright
Use constraints
otherRestictions
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
N
S
E
W
thumbnail


Reference system identifier
WGS 1984
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
Loftmyndasafn ( OGC:WMTS )

Loftmyndasafn

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
2023-04-17T09:59:18
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Point of contact
Landmælingar Íslands - Þjónustufulltrúi ( )
 
 

Overviews

overview
Smámynd af loftmyndasvæðum

Spatial extent

N
S
E
W
thumbnail


Keywords

Aerial photographs GSL Loftmyndasafn orthorectified

Provided by

Associated resources

Not available