XXII ISPRS Congress 2012: Technical Commission VIII

Shortis, M.; Shimoda, H.; Cho, K.

Bibliographic data

Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663822514

Title:: Technical Commission VIII

Scope:: 590 Seiten

Year of publication:: 2014

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663822514

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Shortis, M.; Shimoda, H.; Cho, K.

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VIII/6: Agriculture, Ecosystems and Bio-Diversity]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: MONITORING OF AGRICULTURAL LANDSCAPE IN NORWAY H. G. Wallin, G. Engan

Write comment:: Textverlust im Original.

Document type:: Multivolume work

Structure type:: Chapter

ication accuracy. ising, 52(2), pp. mapped from a onal Journal of 9. Predicting rare at using GIS. sing, 62 (11), pp. tions of data, 'haracterization e Sensing, 28 (4), International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia MONITORING OF AGRICULTURAL LANDSCAPE IN NORWAY H.G. Wallin, G. Engan Norwegian Forest and Landscape Institute, p.b. 115, N-1431 As, Norway — (hgw, gue)@skogoglandskap.no KEY WORDS: Agriculture, Resources, Monitoring, Change Detection, Aerial, Stereoscopic. ABSTRACT: An overall societal aim is to ensure a sustainable use and management of agricultural landscapes. This requires continuous delivery of reliable and up-to-date information to decision-makers. To be able to deliver this information, a monitoring program for agricultural landscapes was initiated in Norway 13 years ago. The program documents and reports on land use / land cover changes from data captured through interpretation of true colour aerial photos using stereo instruments. The monitoring programme is based on a sample of 1000 squares of 1 x 1 km and the entire sample of squares is photographed over a five-year period. Each square is then mapped repeatedly every fifth year to record changes. Aerial photo interpretation is based on a custom classification system which is built up hierarchically, with three levels. The first level comprises seven land type classes: Agricultural land, Bare ground, Semi-natural open vegetation, Unforested wetland vegetation, Forest, Urban areas and Water. These land classes are further divided into 24 land types at level two, and approximately 100 land types at level 3. In addition to land type units we map both line elements like stone fences and point elements like buildings and solitary threes. By use of indicators that describe status and change focusing on themes of particular policy interest, we can report on whether policy aims are being fulfilled or not. Four indicator themes have been in focus hitherto: landscape spatial structure, biological diversity, cultural heritage and accessibility. Our data is stored in databases and most of the data quality check/structure process and analyses are now being made in open source software like PostGIS and PostSQL. To assess the accuracy of the photo-interpretation, ground truthing is carried out on 10 % of the squares. The results of this operation document the benefits of having access to photos of the same area from two different years. The program is designed first and foremost to provide reliable statistics at a national level but the aim is also to report at regional levels — for example for counties or for agricultural landscape regions. The national coverage and application of standardized methods enable frequent updating. This method is cost effective and enables us to quantify changes in landscape qualities as well as adapting the programme to take account of e.g. new findings on relevant indicators. 1. INTRODUCTION Several controls are carried out on the captured data, e.g. illegal codes and missing features. 10 % of the squares are checked 1.1 Landscape monitoring through a field control. To ensure a sustainable use and management of agricultural 2. METHODES landscape the decision-makers need reliable and up-to-date information. Interpretation of land use / land cover from aerial 2.1 Photos photos plays a major role in studies of landscape changes in Norway. The mapping is done by the means of stereo instruments and true color photos. Since the program started in 1998 analogue A monitoring program where the main aim is to register this changes started in 1998. This program is based on a sample of 1000 squares of 1 x 1 km. The squares are photographed each fifth year and the land use / land cover situation is digitized in stereo with a classification system that covers area, lines, points and accessibility (Strand, 2002). By use of indicators that describe status and change focusing on themes of particular policy interest, we can report on whether policy aims are being fulfilled or not. Four indicator themes have been in focus hitherto: landscape spatial structure, biological diversity, cultural heritage and accessibility. Cultural heritage from existing register is displayed in the stereo model so that the interpreter will update the situation for each element that is registered. A lot of the cultural heritage (as barrows) is hidden by trees. The classification system gives the Interpreter the opportunity to use different types of codes describing the situation. instruments have been replaced with digital instruments. The airborn cameras have also changed from film based to digital CCD. This has improved the quality of the aerial images incredibly. To interpret a photo there are some things you need to know. The date the photo is taken is very important. The nature looks differently in spring, summer and early autumn. There are also different types of farming in different parts of Norway, so the operator needs to know where in the country the photo is taken. A real challenge is to distinguish between the different stages and activities: from full activity to abandonedfarms. The scale of the photos has also changed over the period of registration. In Norway we now have a national program for full photo cover with an interval of five to six years. The agricultural monitoring program (3Q) has decided to use these photos because of the cost-effectiveness. The ground sample distance (GSD) varies from 30 to 50 cm.

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