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Application user manual - Computer Graphics and Interactive Systems

1. Private use My files Figure 24 FTP data retrieval panel 6 4 My data management Allows the user to monitor and manage its own uploaded data Figure 25 Here you can perform search operations download files change privacy attributes etc Cu Data management window m Search by keywords within the file name or status Use empty string to reset the search Upload local files LJ Status Privacy Name Upload from OGC C Valid private Useriworkflow__EVI_ EVLOP2_ final 8 821 tif C Valid private User EVI_istanbul_B2 tif Upi oad from FTP Valid public User EVI_istanbul_B3 tif My files LJ Valid private User EVI_istanbul_B4 tif C Valid private User EVI_istanbul_B5 tif Figure 25 My files management panel All the results that correspond to the search pattern will be displayed in the bellow resources table In order to disable the search effect just set the text input to empty string and hit the Search button Download selected will create an archive with all the selected images that you could download on your local machine The flow applied to each resource satellite image in particular that you want to upload is the following You should first select it from your local machine Start the upload to the GreenLand2 data repository by following the step 5 in the Use case scenario 2 Create execute your own project section Once the upload finishes the resour
2. Missing coordinate value s image height image widi Upload local files Image projection Upload from OGC Coordinates points of the selected area lat lon ee ea My files Bf 7 e 7 The geographical selection wil ALWAYS have a rectangular shape based on the min and max latitude and lonatude Figure 22 System message when using wrong inputs After all the inputs were properly specified the next step will be to download the data through the use of the WCS service In order to achieve this functionality use the Upload to GreenLand repository After that a popup window will be displayed that will ask the user to name the image that will be downloaded A privacy attribute could also be specified Using the Save image to GreenLand repository enables the data transfer Figure 23 Use this name when saving the image image_from_wcs Use this privacy attribute when saving the image Private use Save image to GreenLand repository Figure 23 Save OGC data form Within the data transfer process a spinning wheel animates in order to show the transfer progress At any time the user has the possibility to cancel the download The same conversion principal is applied as in the case of uploading local files 6 3 Use FTP protocol to retrieve data The third method of uploading data into the GreenLand repository is through the use of the FTP protocol The Upload from FTP option allows the usage of data from remote FTP s
3. 703125 wai C 16 69921875 D 16 699213875 The geographical selection will ALWAYS have a rectangular shape based on the min and max latitude and longitude values of these points Figure 21 Data retrieval based on OGC services In order to retrieve data the WCS implementation was required By default when a new layer is selected the Image width Image height Image projection are automatically determined from the GetCapabilites file If this file does not contain such information the standard values are displayed 10 pixels for the width and height of the image and the EPSG 4326 projection It is worth to mention that the image width and height should not exceed the 10 10 000 pixels interval A validation form will notify the user when wrong information is specified Figure 22 Map selection is used to specify the geographical area coordinates that will be use in the WCS get data requests Only rectangular selections are allowed and they could be described with the use of the mouse by selecting the rectangular shape on the right of the zoom slider or with the use of the keyboard by setting the latitude and longitude coordinates for the A B C and D points Resizing and moving an existing map selection is another feature implemented within the OGC data retrieval Data management wind The following errors occured Height field should contain integers values in the 10 W 10 000 range
4. GreenLand2 application User manual Contents EY A A ESS SEES ALE SEREL NFB a NPD SEERE 3 ZA Se interface presenta o REED SER 4 A E eatur A O O SE REE 5 4 Use case scenario 1 Use an already existing io oasis esse 6 5 Use case scenario 2 Create execute your own project ooooooncncnccccccncnnnnnnnnnnnnonononananacocococacananononanonos 8 O RESOU eS Mandec meN Sa a a eerie tea enact Eee ER Re eN DEN Re REE 16 a e Sadao AR ed waar AE SENDE tac Ry er pene A Se eat EKS IE BAGE 16 6 2 Use OGC services to retrieve data eneee NE SERENE 17 GRUS EF ERE DKOLOEO e e aa a a ere mets 20 Mat da 21 A E e UE A A A A A 22 1 Introduction Our society needs and environmental predictions encourage the applications development oriented on supervising and analyzing different Earth Science related phenomena Satellite images could be explored for discovering information concerning land cover hydrology air quality and water and soil pollution The main objective of the GreenLand2 application is the generation and execution of workflows based on satellite images The GreenLand2 application development is based on simple but powerful notions of mathematical operators and workflows that are used in distributed and parallel executions over the Grid infrastructure The nodes of the graph could take the form of a simple operator or a sub workflow Multiple nested levels are allowed within the GreenLand2 application All the time consuming operati
5. aits for the user to authenticate with the right credentials username and password After this step the user information is displayed within the GreenLand2 application By clicking on the user name or the down arrow a list appears and offers the user the possibility to logout 2 Application logos Represent the GreenLand2 and the enviroGRIDS project within the application was developed Both images are linked to other web pages that contain detailed information about the objectives and the attributes that they refer to 3 Menu options It contains the most needed operations on a regular usage of the application A detailed description of each option is provided bellow in the following paragraphs It is worth to mention that the GreenLand2 application offers much more features that are not part of the general menu and that will also be described later within this document 4 Projects list The project represents the basic notion of the GreenLand2 framework It contains a list of resources basically input data satellite images text files numerical values strings etc and a group of workflows that will be executed over the Grid infrastructure Projects name are unique within the list of a user When a user registers the GreenLand2 application a default project is automatically provided by the system 5 Workflows list A workflow represents in its simplest form a basic operator More complex workflows could be created by connecting the ex
6. ation has the effect of breaking multi band images into several single banded ones The conversion result is displayed to the user in the My files option panel 6 1 Upload local files The user is able to use in the Grid processes its own satellite images These files could be located onto its physical machine so a local files upload would be required in this case Specifying the files that are going to be uploaded the user should click on the Attach files button By this time the files table should look like the one presented in Figure 20 The files privacy attribute is by default set to private but it could be adjusted by using the Private public combo box If some of the files listed in the data table are not suitable for the upload operation the user has the possibility to remove them though the Remove selected button All the previous mentioned operations are performed before the actual upload In order to start the data transfer the Upload list for button should be used At this time a progress bar displays the upload status Data management window OM a E Upload only geographically referenced resources Upload files list Upload local files L Name Size Mb OC Ev istanbul_B2 tif 60 21 Upload from OGC O Ev istanbul_B3 tif 60 21 Upload from FTP C EvVListanbul_B4tif 60 21 My files O EvListanbul_B5tif 60 21 Figure 20 Upload local files panel 6 2 Use OGC se
7. ce will be set with the Checking status This means that an internal algorithm analyzes the image and tries to convert it into a standard GreenLand2 format If the uploaded image is a multiband one it will automatically be divided into several single band images equal to the number of bands contained in the multiband image For further processing over the Grid infrastructure only the images bands could be used If you select an operator that deals with multiband images you should use the Combine operator first This operator generates a multiband image that you could use as input for other GreenLand2 operators e f the image is properly formatted is will have the Valid status otherwise the Error one 7 Conclusions This is the first version of the GreenLand2 application and there are some things to be improved or added as new functionalities e Extend the GreenLand2 database with new workflows e Allow the user the possibility to create its own workflows using a WorkflowEditor module e Implement the online result analysis module e Support for the OGG services
8. e NewProject menu bar option New project Edit project Delete project Created at Aug 5 2011 OPEL COIN Figure 7 Identify the New project option In this step both the name and the description fields are mandatory Please take care when naming your project All the projects in your projects list should have unique names Create a new project Name Project_demo Description My first project CANCEL Figure 8 Create a new project Step 3 Add new workflows to the current created project Use the Add workflows menu bar option MAN Add workflows Remove workflows Start proj button to add content to this project Figure 9 Identify the Add workflows option At this time a table should appear in the right of the workflows list populated with all the workflows that exist in the GreenLand2 database and are available for this user In order to attach an operator to the current selected project you should first select it by using its corresponding check box located in the first column of the table Multiple workflows could be selected and after that use the Add workflows button under the table to finish the attachment action Figure 9 r Workflow name Workflow description Creates a Normalized Difference Vegetation Index image based on 2 input singleband L Creates an Enhanced Vegetation Index image based on 3 singleband input images COLOR Combines three single banded images into a 3 layer c
9. ect IAN Add workflows Remove workflows C NDVI 4 instances HEC ERE NDVI 4 V EVI 3 instances 111 i completed Figure 12 Remove workflows from the current selected project Step 5 Upload external files Use the DataMng menu option Figure 13 in order to upload your own images or files A popup window will be displayed and the Upload files section will automatically be selected Start project Project Information Name test 17 Created at Jan 25th 2012 Figure 13 Upload external resources Once you manage to reach to this step the Attach files button will allow you to browse through the system files and directories and load the resources that you desire Be careful at the files types because only geographically referenced images validate the GreenLand2 internal format All the selected files will appear in a table as described in Figure 14 Here you have the possibility to add new files or to remove some of the existing ones The file transfer to the server will not start until the Upload list for button will be use It is important to set the privacy attribute for these files For example the Private use attribute means that only you could use these resources after they are uploaded to the server By applying the Public use settings other users will also be able to use them freely but they have no administrative privileges to delete them If the uploaded image is a multiband one it will automat
10. ervers that support anonymous connections or connections based on username and passwords Figure 24 Until now the GreenLand application does not provide support for secure FTP but will be one of the future work features Also browsing through the FTP server folders is not yet implemented The File FTP addresses should contain a valid ftp that could also include the port used by the server in the data exchange process An example of how this address should be formatted is given bellow this text input The next step is to specify the FTP connection type anonymous or password based By un checking the Anonymous connection two text inputs will be displayed where the user should enter the username and password It is worth to mention that the name of the remote file will be preserved when saving the image to the GreenLand repository An extra attribute for the data transfer service is the privacy of the file private or public Using the Save to GreenLand repository button the upload from the FTP server begins A progress bar indicates throughout the whole process the data transfer status At any time the user is able to stop the uploading by using the Cancel button Data management window File FTP address Pe Example ftp e4ftl0 1 c usgs gow MOLT MOD1301 005 2000 02 18 MO 01301 A2000049 h01v07 005 2008270235740 hdfj Uj Anonymous connection Upload from OGC Upload from FTP Use this privacy attribute when saving the data
11. eted Use the Execution results option to manage the results Statistics 1 Workflows and 0 instances Description Test Figure 4 Visualize the process results Once this step completes a new table will appear that contains all the output results for the two specified workflows NDVI and EVI At this moment the results analysis could be performed only on the user local machine by downloading the results using the Download option Figure 5 Project execution details Workflow name Stan time Result 2011 10 13 10 43 50 0 Completed Sabacdf8 bag4 4343 3 2011 10 13 10 43 50 0 Completed 5abacdf8 ba84 4a43 4 gt Download Sabacdf bacd 4a43 a21 5abacdfa ba84 4343 921 Figure 5 Output result management and analysis After a project finishes its execution the workflows list could be modified add new items or remove some of the existing ones Also you could specify new inputs for the workflows and start a new process based on the values that you specified follow the steps 3 4 5 and 7 described in section 5 Use case scenario 2 Create execute your own project Use case scenario 2 Create execute your own project This section highlights all the necessary steps used for executing a new project that contains a list of workflows specified by the user Step 1 Sign in your account a a Username Password IS Sign in Figure 6 Sign in GreenLand2 application Step 2 Create a new project Use th
12. ically be divided into several single band images equal to the number of bands contained in the multiband image For further processing over the Grid infrastructure only the images bands could be used If you select an operator that deals with multiband images you should use the Combine operator first This operator generates a multiband image that you could use as input for other GreenLand2 operators Data management window BE JN Uos is or TA Upload only geographically referenced resources Upload files list Upload local files L Name Size Mb C EVL_istanbul_B2 tif 60 21 Upload from OGC C EVL_istanbul_B3 tif 60 21 Upload from FTP O EVI istanbul_B4 tif 60 21 E My files C EVi_istanbul_B5 tif 60 21 Figure 14 Upload files list The Step 5 section describes only the operation of uploading files from your local machine But the GreenLand application offers two more possibilities retrieve data from OGC or FTP servers that will be presented in chapter 6 Resources management Step 6 Specify workflow inputs In order to accomplish this step simply click on a workflow This action will display all the primary inputs of that workflow and for each input a list of possible values e g satellite images are provided to the user The user could specify for each input a single value that will be used further on in the Grid based execution process Using the Save button all the values yo
13. ing on the workflows complexity Start project Project execution details Gr 2011 09 16 14 40 36 0 Completed eb7ddd1d 69d48 4a07 Pow Download Test 2011 09 16 14 40 36 0 Completed eb7ddd1d 69d8 4a07 Gt 2011 09 16 14 40 36 0 Completed eb7ddd1d 59d8 4207 Figure 18 Output result management 6 Resources management Each user is able to manage its own resources as he desires The resource management option activates by using the DataMng menu option The general overview of this module is presented in Figure 19 Data management window mn Search by keywords within the file name or status Use empty string to reset the search atus rivacy ame Upload local files O Stat Pri N Upload from OGC _ Valid private Useriworkflow__EVI_ EVLOP2_ final 8 821 tif C Valid private User EVI_istanbul_B2 tif Upload from FTP C Valid public User EVI_istanbul_B3 tif My files LJ Valid private User EVI_istanbul_B4 tif C Valid private User EVI_istanbul_B5 tif Figure 19 User resource management module There are four operations that could be performed by the logged in user through the DataMng menu option In each situation the data retrieving process consists of two phases e Data transfer to the GreenLand repository e Data analysis and conversion This phase tries to convert the current uploaded image into an internal GreenLand format GeoTIFF This oper
14. isting operators and current workflows in different ways One of the main objectives of this application includes a Workflow Editor that will assist the user in building such complex workflows Adding two satellite images extracting bands from a Landsat image computing vegetations indices NDVI EVI GEMI etc represent a few of the basic operators included within the GreenLand2 application 6 General information window All the users actions results are displayed in this application module Basically it contains a large set of features that will activate based on the users requests e g allows the user to specify the inputs for all the workflows included in a project displays the Grid execution progress output result management etc New project Edit project Delete project Start project DataMng Execution completed Project information Istanbul test 18 Jan Name Istanbul test Created at Jan 18 2012 Status Execution completed Senso ot ia Status Execution completed Use the Execution results option to manage the results Black sea catchment Created at Jan 18 2012 Status Pending execution Description test sanourtest Esener resus Created at Jan 18 2012 Status Execution completed Statistics 2 Workflows and 0 instances Rioni river case study Created at Jan 18 2012 Status Execution completed Mosaic operator test Created at Jan 18 2012 Status Execution completed Figure 1 GreenLand2 graphical user i
15. nterface modularization 3 Menu option features This section contains the short description of the menu bar options provided by the GreenLand2 application e New project it allows the creation of a new project A project is one of the key concepts of the GreenLand2 application that stores one or more workflows e Edit project useful for changing the name or the description of an already existing project e Delete project allows the user to delete an existing project This action is triggered together with a warning popup message just to clearly notify the user regarding this aspect e All it could be used to check uncheck all the expandable workflow together with their child items in the workflows list e Add workflows opens a table populated with existing workflows inside the GreenLand2 database Using this feature the user is able to attach a list of workflows to the current selected project e Remove workflows in order to remove a workflow the user has to select it first The selection is made by checking the combo box module positioned on the left side of the workflow s name e Start project by using this option the user triggers the Grid execution related to the current selected project Several pre processing validations are performed such as e Check if the project contains at least one workflow e Check if all the workflows inputs are properly specified e etc e DataMng allows the user the possibility to manage i
16. olored one L DOS Removes haze caused by atmospheric phenomena It operates on a singleband imag View Normalizes image so thatitis brought within Integer 0 255 pixel range Arith Performs arithmetic operations on satellite images L GEMI Generates a Global Environmental Monitoring Index image based on two singleband i Combine Generates a multiband image based on two single banded or multibanded input im Ll Land Removes any kind of atmospheric interfernece Ext Extracts images from Geotiff multiband ones Ll Region_Projection Extracts the region and the projection of a given image Add workflows Figure 10 Select workflows list It is worth to mention that the same workflow could be multiply within the same project Figure 11 but each of its instances will have a different name contains the workflow s name and an index that represent the number of instances for this workflow For example if the NDVI workflow is added it will be inserted under the NDVI name If a second insertion is made then the NDVI_1 name will be used and so on Delete project E All Add workflows Remove workflows C NDVI 4 instances JEVI 3 instances 111 completed Figure 11 Create multiple instances of the same workflow Step 4 Remove workflows At any time you could add new workflows by following Step 2 or remove workflows from a project by using the Remove workflows menu bar option Delete proj
17. ons are executed over the Grid infrastructure Such a mechanism offers a better use of available distributed resources in a transparent way Especially when considering the size of geospatial data and the amount of processing time required to rectify extract relevant features and make available for viewing The GreenLand2 application offers a friendly user interface for viewing and editing workflows and operators The description involves the basic operators provided by GRASS library as well as many other image related operators supported by the ESIP platform The processing workflows are represented as directed graphs giving the user a fast and easy way to describe complex parallel algorithms without having any prior knowledge of any programming language or application commands Also this Web application does not require any kind of install for what the house hold user is concerned It is a remote application which may be accessed over the Internet For more information regarding the GreenLand2 application you could consult the department page http cgis utcluj ro applications greenland or contact us at the following emails dorian gorgan cs utcluj ro vasile mihon Ocs utcluj ro 2 User interface presentation layer The GreenLand2 user interface presentation layer is highlighted in Figure 1 The entire application is divided into 6 main modules that perform the following When first accessing the application it displays a sign in form and w
18. rvices to retrieve data Another convenient way to import data into the GreenLand repository is through the OGC Open Geospatial Consortium services The Upload from OGC option implements the WMS and WCS services The WMS is used to display different layers onto an interactive map while the WCS service is used in order to retrieve data that correspond to the user s needs Figure 21 First of all the user needs to input the web address of the server that hosts the OGC services In order to have access to the data the Connect button should be used The information displayed in the graphical interface is stored in the GetCapabilities xml file This file is then analyzed and its information organized within the Layers combo box Each time a new item is selected from the layers list the interactive map will overlay it over the proper geographical region specified by the GetCapabilities file All these steps represent the WMS implementation of the OGC services and offer only the visual effect of the OGC capabilities Data management window Url for the OGC service http preview grid unep ch 8080 geosery er wd Service version Layers 100 Cyclones intensity M U ad local files Image width Image height Image projection iii 360 139 EPSG 4326 Upload from OGC Coordinates points of the selected area lat lon es ie INEA Upload from FTP A 40 95703125 53 26171875 My R B 40 95
19. ts own resources uploaded into the GreenLand2 data repositories Downloading and uploading represent two of the operations provided by this feature 4 Use case scenario 1 Use an already existing project The following section highlights what are the steps required for performing a valid Grid processing using the features provided by the GreenLand2 application This use case contains an already defined project called Istanbul_project_imported In this case the project contains two workflows NDVI and EVI Step 1 Sign in your account Usemame po Password Sign in Figure 2 Sign in GreenLand2 application Step 2 Open the project content The process step was already completed for this project using the Grid infrastructure Click the project name to open its content Figure 3 It is important to mention that you could not execute a project that has the Executing project status This status is displayed just under the project name in the projects list New project Edit project Delete project np 1 ro ect mporten Created at Oct 10 2011 Status Execution completed Figure 3 Identify the project and open its content Step 3 Output results management In order to handle the output results just select the project from the project list and use the Execution results option Figure 4 Start project Project information Name NDVI Imported Author Created at Oct 12 2011 Status Execution compl
20. u specified for these inputs will be save and there is no undo possibility The Resume last saved option play the undo role but only if it does not immediately follows after a save action Figure 15 MA Add workflows Remove workflows Start project E NDVI Specify the workflow inputs 1 Name NDVIIG4 Type imagestif Value mage1_Red 3 Z Name NDVLIG5 Type image tif Value Image1_NIR Save Resume last saved Figure 15 Remove workflows from the current selected project Also you could change the name and the description of the workflow Step 7 Start the Grid processing After all the workflows inputs were properly specified the execution process could begin using the Start project menu bar option Al Add workflows Remove workflows Start project Datahing Figure 16 Identify the Start project option After this action a monitoring table will be display that highlights the processing progress Figure 17 Project execution details 2011 10 13 10 43 50 0 Running 2011 10 13 10 43 50 0 Completed 5aBacafB bag4 4a479 4 Figure 17 Monitor the project execution Step 8 Output results management When a workflow finishes its execution a list of results will be available together with a download option Figure 18 Using this option the user is able to download the result on its local machine and analyze its different aspects It is worth to mention that the execution process may take some time depend

Application user manual - Computer Graphics and Interactive Systems

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