Developer's Guide - MapGuide Open Source - OSGeo

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Maps A map (MgMap object) is created from a map definition resource. The map definition contains basic information about the map, including things like ■ the coordinate system used in the map ■ the initial map extents ■ references to the layer definitions for layers in the map When the MgMap object is created, it is initialized with data from the map definition. As a user interacts with the map, the MgMap may change, but the map definition does not. The map is saved in the session repository so it is available to all pages in the same session. You cannot save a map in the library repository. Map creation is handled by the Viewers. When a Viewer first loads, it creates a map in the session repository. The map name is taken from the map definition name. For example, if a web layout references a map definition named Sheboygan.MapDefinition, then the Viewer will create a map named Sheboygan.Map. If your application does not use a Viewer, you can create the map and store it in the repository yourself. To do this, your page must ■ Create an MgMap object. ■ Initialize the MgMap object from a map definition. ■ Assign a name to the MgMap object. ■ Save the map in the session repository. For example, the following section of code creates an MgMap object named Sheboygan.Map, based on Sheboygan.MapDefinition. 20 | Chapter 1 Introduction
$mapDefId = new MgResourceIdentifier( "Library://Samples/Sheboygan/Maps/Sheboygan.MapDefinition"); $map = new MgMap(); $mapName = $mapDefId->GetName(); $map->Create($resourceService, $mapDefId, $mapName); $mapId = new MgResourceIdentifier( "Session:$sessionId//$mapName." . MgResourceType::Map); $map->Save($resourceService, $mapId); Understanding Services The Map<strong>Guide</strong> site performs many different functions. These can be all done by a single server, or you may balance the load across multiple servers. Some essential functions must execute on the site server, while other functions may execute on support servers. A service performs a particular set of related functions. For example, a resource service manages data in the repository, a feature service provides access to feature data sources, and a mapping service provides visualization and plotting functions. Before a page can use a service, it must open a site connection and create an instance of the necessary service type. The following example creates a resource service and a feature service: $userInfo = new MgUserInformation($mgSessionId); $siteConnection = new MgSiteConnection(); $siteConnection-><strong>Open</strong>($userInfo); $resourceService = $siteConnection-> CreateService(MgServiceType::ResourceService); $featureService = $siteConnection-> CreateService(MgServiceType::FeatureService); Understanding Services | 21
Page 1 and 2: MapGuide Open Source Developer’s
Page 3 and 4: Contents Chapter 1 Introduction . .
Page 5: Another Way To Create Layers . . .
Page 8 and 9: What This Guide Covers This guide d
Page 11 and 12: This next sample MapGuide page disp
Page 13 and 14: Example Code This sample illustrate
Page 15 and 16: echo 'Map ' . $map->GetName() . ' u
Page 17 and 18: displays the spatial reference syst
Page 19 and 20: Viewer Frames Most custom MSPs disp
Page 21 and 22: Viewer Sample Application - Zoom
Page 23 and 24: Embedding a Viewer in Your Own Page
Page 25: Resources and Repositories A MapGui
Page 30 and 31: Overview of Layers Layers represent
Page 32 and 33: Layer Style Layer Visibility The da
Page 34 and 35: function OnPageLoad() { parent.Zoom
Page 36 and 37: MgInitializeWebTier ($webconfigFile
Page 39 and 40: Working With Feature Data 3 In this
Page 41 and 42: Querying Feature Data In order to w
Page 43 and 44: Examples These examples assume that
Page 45 and 46: $districtQuery = new MgFeatureQuery
Page 47 and 48: $districtQuery = new MgFeatureQuery
Page 49 and 50: There are different selection tools
Page 51 and 52: Script command. See Example: Listin
Page 53 and 54: 4 Initialize the MgSelection object
Page 55 and 56: the $layerClassName = $layer->GetFe
Page 57 and 58: The PHP code in this example create
Page 59 and 60: $resourceService = $siteConnection-
Page 61 and 62: Modifying Maps and Layers In this c
Page 63 and 64: This example ■ loads a layer that
Page 65 and 66: } // ... The page then goes on to s
Page 67 and 68: Function CreateScaleRange() CreateA
Page 69 and 70: Function CreateLineTypeStyle() Crea
Page 71 and 72: ... //-----------------------------
Page 73 and 74: Adding Layers To A Map The precedin
Page 75 and 76: function add_layer_resource_to_map(
Page 77 and 78:
Analyzing Features In this chapter
Page 79 and 80:
■ MgLineString — a series of co
Page 81 and 82:
To create an MgCoordinateSystem obj
Page 83 and 84:
■ Determine the SRS for the featu
Page 85 and 86:
Inserting, Deleting, and Updating F
Page 87 and 88:
Example $queryOptions = new MgFeatu
Page 89 and 90:
} The geometries for the selected f
Page 91 and 92:
$map->Save($resourceService); The f
Page 93 and 94:
} 'ResourceId')->item(0); $featureS
Page 95 and 96:
Digitizing and Redlining In this ch
Page 97 and 98:
For example, see task_pane_redlinin
Page 99 and 100:
Create a temporary feature source t
Page 101 and 102:
Custom Output In this chapter ■ I
Page 103 and 104:
■ Images can be copied to the Win
Page 105:
$dwfVersion = new MgDwfVersion("6.0
Page 108 and 109:
G geographic coordinates 74 geometr
Page 110:
Viewer, embedded in HTML page 17 Vi
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