MOUNT KULAL FOREST CHANGE MAP

Transcription

1 Product Secfcaton Sheet Creaton date: 12/04/2010 MOUNT KULAL FOREST CHANGE MAP OUTLINE Informaton of satal data roduct secfcaton Ttle Secfcatons for the Mount Kulal forest change ma, calculated from the dfference between the forest/non-forest cover mas of 1986 and The forest/non-forest cover mas are derved from data orgnatng from the Landsat sensor. Date 13/11/2008 Imlementer ENDELEO roject UGent, Toon Westra Language Englsh Engneerng feld Envronmental montorng Document data format PDF Purose Forest cover montorng: the ma ndcates where the forest has (ds)aeared between the two years of nterest. Satal extent ULX LRX ULY LRY Temoral extent 1986 August 8 th and 2000 January 27 th Reference standards Termnology and defntons The followng techncal terms and defntons are used wth ths data roduct secfcaton: Kenya rofle for geograhc standards (KPGIS) ver. 1 Abbrevatons ULX: Uer left X coordnate ULY: Uer left Y coordnate LRX: lower rght X coordnate LRY: lower rght Y coordnate 2. DOMAIN OF VALIDITY Doman of valdty dentfcaton Data roduct secfcaton of the forest change ma of for Mount Kulal forest Herarchcal level Dataset 3. DATA PRODUCT IDENTIFICATION of satal data roduct Mount Kulal forest change ma of Date 1986 August 8 th and 2000 January 27 th Contact Informaton

2 r. Flore Devrendt Couure Lnks 653 B-9000 Gent Belgum e-mal: Geograhcal descrton Mount Kulal forest 4. DATA CONTENTS AND STRUCTURE Alcaton schema class dagram Not alcable Alcaton schema document Feature Image Defnton Mount Kulal forest change ma of Parent class None Abstract/Concrete Concrete Attrbutes Defnton Collecton condton Doman Data format: GeoTff 0 = No data 1 = Non-Forest unchanged 2 = Forest cover decrease 3 = Forest cover ncrease 4 = Forest unchanged Wthn geograhcal extent 5. REFERENCE SYSTEM Satal reference system Comound coordnates reference system Identcal name Clarke 1880, Mean sea level (Mombasa), UTM zone 37 Coordnates reference system 1 (Horzontal comonent) Identcal name Clarke 1880, UTM zone 37 Doman of valdty Narob Datum Identcal name New (1960) Arc Tye Geodetc Fxed orgn 500,000m Eastng, 10,000,000m Northng Ellsod Identcal name Clarke 1880, (Modfed) Sem major axs Inverse flattenng 1 / Prme merdan Identcal name Greenwch merdan Greenwhch 39deg 00mn East of Greenwch longtude Coordnate system Identcal name UTM zone 37 Tye Projected Number of dmensons 2

3 Coordnate axs Drecton Unt dentfer Coordnate axs Drecton Unt dentfer Northng Postve to true north at orgn Meter Eastng Postve to true east at orgn Meter - Temoral reference system 6. DATA QUALITY Qualty requrements and qualty evaluaton rocedure COMPLETENESS: not alcable LOGICAL CONSISTENCY (1) Formal consstency Doman of valdty Mount Kulal forest change ma of (2) Doman consstency Doman of valdty Mount Kulal forest change ma of Data qualty evaluton ndex Omsson ercentage Defnton Data can be oened by ArcGIS as GeoTff format wth no oenng error Qualty conformty level Error: 0% Data qualty evaluton ndex Defnton Qualty conformty level Error: 0% POSITIONAL ACCURACY: not adoted TEMPORAL ACCURACY: not adoted THEMATIC ACCURACY (1) Thematc classfcaton correctness Attrbute error ercentage The attrbute defnes values from zero to four. No xels have a value out of these attrbute range Doman of valdty Data qualty evaluaton ndex Mount Kulal forest change Thematc class correctness ma of Defnton Comarson between forest/non-forest ma and reference dataset Qualty conformty level KIA = varable Qualty evaluaton rocedure The evaluaton of the forest change ma deends on the accuracy of the two forest cover mas from whch the change ma s comuted. Accuracy assessment of the forest cover mas s erformed by comarng t wth a reference dataset. Ths reference set ncludes olygons that are assumed to belong to a certan class by vsual nterretaton. The qualty measure used s the Kaa Index of Agreement (KIA) whch s calculated from the error matrx. An error matrx s constructed by comarng, xel er xel, the reference dataset wth the classfcaton ma as llustrated below.

4 Classfcaton ma Reference dataset Class 1 Class 2 Class I Total Class 1 x 11 x 12 x 1I x 1 Class 2 x 21 x 22 x 2I x 2 Class I x I1 x I2 x II x I Total x 1 x 2 x I N The KIA statstc measures the dfference between the actual agreement between the reference data and an automated classfer, and the change agreement between the reference data and a random classfer. Concetually, KIA can be defned as KIA 1 x Ths statstc serves as an ndcator of the extent to whch the ercentage correct values of an error matrx are due to true agreement versus change. 7. DATA PRODUCT DISTRIBUTION Dstrbuton format nformaton Format name GeoTff Encodng rules htt://trac.osgeo.org/geotff/ Language encodng method UTF-8 Language Englsh Dstrbuton meda nformaton Unt of roduct Image of the forest change n Mount Kulal forest between 1986 and 2000 derved from Landsat Meda name FTP 8. METADATA Drecton of metadata creaton Metadata must be roduced together wth satal data Format of metadata KSISO19115 metadata wll be adoted Indcaton of metadata elements Drecton of unt of metadata creaton

5 Metadata s rovded for each satal data roduct dataset unt. 9. OTHERS Satal resoluton 28,5m x 28,5m Interretaton The forest change ma s used to qualtatvely comare the forest area n a certan erod of the year wth the same erod a number of years later. A vsualsaton s made of where and how much forest dsaeared, develoed or remaned unchanged. Ths can be used to examne f secfc sustanable management measures have to be taken n consderaton n the future. The value zero ndcates mssng data. The value one corresonds to non-forested areas n the frst year that remaned unchanged n the second year. If the value two s obtaned, then forested areas n the frst year converted to non-forested areas n the second year. The value three s gven to non-forest areas n the frst year that turned forested n the second year. The value four corresonds to forested areas n the frst year that reman forested n the second year. Ctaton Please cte as follows: ENDELEO. Mount Kulal forest change ma Retreved MM DD, YY from htt://endeleo.vgt.vto.be/. More nformaton Landsat msson htt:// htt://glovs.usgs.gov/ ENDELEO roject htt://endeleo.vgt.vto.be/