data access and data extraction services within the land imagery portal

Data access and Data extractionServices within the Land Imagery portal

Jerome Gasperi @ CNES | HAWG - Models for scientific exploitation of EO DataFrascati, Italy - October 12th, 2012

https://wiki.services.eoportal.org/tiki-index.php?page=Models+for+scientific+exploitation+of+EO+Data

https://wiki.services.eoportal.org/tiki-index.php?page=Models+for+scientific+exploitation+of+EO+Data

Land Imagery Portal

Overview

Search service

Download service

What's next

Thematic data extraction

Land Imagery Portal

The PTSC* is the future French "Thematic Center for Land Imagery"

* temporary name, subject to change when operational

v0 (end of 2012)Official launch of the portal

v1 (2013)additionnal datasets from CNES and partners, SSO integration, etc.

Search service

Metacatalogbased on SITOOLS

Indexes each data providersmetadata using dedicatedconnectors (OpenSearch,CSW CIM or CSW ISO)

Metadata are stored within aninternal structure including

necessary properties to be compliantwith INSPIRE and HMAmetadata requirement

Additional information can be storedbeside metadata

(e.g. thematic classification)

Offers multiple search interface(OpenSearch, CSW ISO - INSPIRE,

CSW EO - HMA)

Kalideos

SPIRITOpe

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SPOT Archives

POSTEL

MUSCATE

CNES

CSW

CIM

IGNGeoportal catalog

CSW

ISO

GEOSUDGEOSUD catalog

Data providersRegistry index

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Users

PTSCv?

v1

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CSW EO - HMA)

Kalideos

SPIRITOpe

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SPOT Archives

POSTEL

MUSCATE

CNES

CSW

CIM


CSW

ISO



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Users

PTSC

INSP

IRE

HM

A

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CSW EO - HMA)

Kalideos

SPIRITOpe

nSea

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SPOT Archives

POSTEL

MUSCATE

CNES

CSW

CIM


CSW

ISO



Ope

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rch

Users

PTSC

INSP

IRE

HM

A

V0

v?

v1

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CSW EO - HMA)

Kalideos

SPIRITOpe

nSea

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SPOT Archives

POSTEL

MUSCATE

CNES

CSW

CIM


CSW

ISO



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Users

PTSC

INSP

IRE

HM

A

V0

V1

v?

v1

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Download service

Product download url is embeded within the product metadata returned by the search service

Two cases :url content mimeType is "text/html"

No direct download. The url is opened in another browser tab. User follows the instructions on the corresponding web page to download the product (this is typically the case for a product that required to explicitely sign an NDA before downloading it)

otherwise product can be downloaded directly

No common downloading format has been decided yet. The products are downloaded as is.

What's nextThematic data extraction

Important note - the following slides present a proposal that will be discussed by the PTSC partners to be integrated (or not) within the Land Imagery portal.

Thematic data extraction

?How to search within the portal for productsthat contains coastal cultivated areas ?

Orthorectified image

Orthorectified image

What we got

Orthorectified image Characterized image

What we got


This is urban

This is water

This is forest

What we got


This is urban

This is water

This is forest

What we got What we need

How to do this ?

SLACkERSimpLe Automated Characterization of EaRth observation products

SLACkER uses GLC 2000 classification to perform an automatic and location based

characterization of products

World land coverTIFF file ~ 650 Mo1 km resolution1 color = 1 thematic class22 classes

Global Land Cover 2000

Metacatalog

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PTSC 1. Get footprint bounding box 2. Get GLC2000 area

3. Process characterization

4. Store results SLACkER

0. Get metadata

IdentifierDescriptionCopyrightAcquisition dateAcquisition anglesThumbnail...+ Footprint

Tag table images within database glc2000 >> Add classification columns >> Processing 10 Crop GLC2000 raster : 24137 6169 156 119 Polygonize extracted raster Process footprint against Global Land Cover Store classification => 40.89% of Deserts (10 + 14 + 19) => 31.89% of Herbaceous (9 + 11 + 12 + 13) => 14.71% of Water (20) => 9.27% of Cultivated (15 + 16 + 17 + 18) => 3.2% of Forests (1 + 2 + 3 + 4 + 5 + 6)

( 28.65 % of 14 : Sparse Herbaceous or sparse Shrub Cover ) ( 6.1 % of 18 : Mosaic: Cropland / Shrub or Grass Cover ) ( 12.24 % of 19 : Bare Areas ) ( 31.88 % of 12 : Shrub Cover, closed-open, deciduous ) ( 2.5 % of 3 : Tree Cover, broadleaved, deciduous, open ) ( 14.71 % of 20 : Water Bodies (natural & artificial) ) ( 0.13 % of 15 : Regularly flooded Shrub and/or Herbaceous Cover ) ( 2.81 % of 16 : Cultivated and managed areas ) ( 0.69 % of 4 : Tree Cover, needle-leaved, evergreen ) ( 0.21 % of 17 : Mosaic: Cropland / Tree Cover / Other natural vegetation )

Processing result example

INPUT : metadata

OUTPUT : additional thematics info storedbeside the metadata within the Metacatalog

Thematic sliders

SPOT cover - 1,300,000 scenes

Search for coastal cultivated area ?

Search results(footprints displayed in black over the map)

Coastal cultivated area

Thematic classificationis displayed within

the result metadata

costal...

...cultivated area

https://vimeo.com/51045597



data access and data extraction services within the land imagery portal

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