Developer's Guide - MapGuide Open Source - OSGeo

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Introduction This chapter describes how to modify maps and layers. Adding An Existing Layer To A Map If the layer already exists in the resource repository, add it to the map by getting the map’s layer collection and then adding the layer to that collection. $layerCollection = $map->GetLayers(); $layerCollection->Add($layer); By default, newly added layers are added to the bottom of the drawing order, so they may be obscured by other layers. If you want to specify where the layer appears in the drawing order, use the $layerCollection->Insert() method. For an example, see Adding Layers To A Map (page 67). NOTE In the MapGuide API, getting a collection returns a reference to the collection. So adding the layer to the layer collection immediately updates the map. Creating Layers By Modifying XML The easiest way to programmatically create new layers is to 1 Build a prototype layer through the Studio UI. To make the scripting simpler, this layer should have as many of the correct settings as can be determined in advance. 2 Use Studio’s Save as Xml command to save the layer as an XML file. 3 Have the script load the XML file and then use the DOM (Document Object Model) to change the necessary XML elements. 4 Add the modified layer to the map. The XML schema for layer definitions is defined by the LayerDefinition-version.xsd schema which is documented in the MapGuide Web API Reference. This schema closely parallels the UI in the Studio’s Layer Editor, as described in the Studio Help. 56 | Chapter 4 Modifying Maps and Layers
This example ■ loads a layer that has been created through Studio ■ uses the DOM to changes the filter and its associated legend label You can use the DOM to modify any layers, including ones that already exist in the map, not just new layers that you are adding to the map. You can also use the DOM to modify other resources; the XML schemas are described in the MapGuide Web API Reference. Creating Layers By Modifying XML | 57
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MapGuide Open Source Developer’s
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Contents Chapter 1 Introduction . .
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Another Way To Create Layers . . .
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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 and 26: Resources and Repositories A MapGui
Page 27: $mapDefId = new MgResourceIdentifie
Page 30 and 31: Overview of Layers Layers represent
Page 32 and 33: Layer Style Layer Visibility The da
Page 34 and 35: function OnPageLoad() { parent.Zoom
Page 36 and 37: MgInitializeWebTier ($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: Modifying Maps and Layers In this c
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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Developer's Guide - MapGuide Open Source - OSGeo

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