In order from the top:
Combo box to select a template
Select one from templates with different functions. See Template section.
Tree widget on the left side and panel with widgets on the right side
Items with check box in the tree widget are optional. When the current item is optional and not checked, widgets on the right side are grayed out.
Output HTML file path edit box
Pop-up menu with the following menu items is shown:
Loads export settings from a settings file.
Save Settings As
Saves export settings to a settings file. Default file extension is
Clears current export settings.
Shows Plugin Settings dialog.
Run, Close and Help buttons
Exporting starts when you press the Run button. When the exporting has been done, the exported page will be opened in web browser. At this time, export settings are automatically saved to a file under the same directory as the project file if you are working with a project file. Later the export settings of the project will be automatically loaded into the plugin.
Pressing the Help button will open the local document with default web browser.
This template is a 3D viewer without any additional UI library.
This template has a dat-gui panel, which makes it possible to toggle layer visibility, adjust layer opacity and add a horizontal plane movable in the vertical direction.
Enter a size in 3D world that corresponds to the map canvas width. The default value is 100.
Vertical exaggeration factor. This value affects terrain shape and z positions of all vector 3D objects. This also affects 3D object height of some object types with volume. Object types to be affected:Point : Cylinder, Cube, ConePolygon : Extruded
3D objects of the following types have volume, but their heights aren’t affected by this factor:Point : Sphere, JSON model, COLLADA modelLine : Pipe, Cone, Box
The default value is 1.5.
Vertical shift for all objects. If you want to export high altitude and narrow area, you should adjust the object positions to be displayed at the center of browser by changing this value. If you set the value to -1000, all objects are shifted down by 1000 in the unit of map CRS.
Select either sky-like gradient or a solid color for the background of scene. Default is Sky.
Display of coordinates
Latitude and longitude (WGS84)option is selected, coordinates of clicked position on a 3D object are displayed in longitude and latitude (WGS84). If Proj4js doesn’t support current map CRS, this option is disabled.
You can select a DEM layer from 1-band rasters loaded in QGIS using
Add Raster Layer (GDAL provider). Selected DEM layer is used to
calculate z positions of vector objects. You can also select a flat
plane at zero altitude.
Select a DEM resolution from several levels. This resolution is used to resample the DEM, but is not for texture.
This option enlarges output DEM by placing DEM blocks around the main block of the map canvas extent. Size can be selected from odd numbers in the range of 3 to 9. If you select 3, total 9 (=3x3) blocks (a center block and 8 surrounding blocks) are output. Roughening can be selected from powers of 2 in the range of 1 to 64. If you select 2, grid point spacing is doubled. It means that the number of grid points in the same area becomes 1/4. If map canvas image is selected as the display type, texture image size for each block is maximum 256 x 256.
Advanced (quad tree)
Multiple resolution DEM export. Area you want to focus is output in high resolution and the surroundings are output in low resolution. Draw a rectangle on the map canvas to set focus area. Specifying a point is also possible. The higher QuadTree height, the higher resolution of the focus area. Grid size of each block is 64 x 64.
You can choose from map canvas image, layer image, a image file or a solid color.
Map canvas image
Map canvas image is used to texture the main DEM block in simple resampling mode. Each block of surroundings (in simple resampling mode) and quads (in advanced resampling mode) is textured with image rendered with the current map settings.
Each block is textured with image rendered with the selected layer(s).
Texture with existing image file such as PNG and JPEG file. TIFF is not supported by some browser. See Image format support for details.
To select a color, press the button on the right side.
Increases the size of image applied to each DEM block. This option is enabled when either
Map canvas imageor
Layer imageis selected. You can select a ratio to map canvas size from 100, 200 and 400 (%). Image size in pixels follows the percent.
Sets transparency of the DEM. 0 is opaque, and 100 is transparent.
Transparent background (With map canvas image or layer image)
Makes background of the image to be rendered transparent.
Enable transparency (With image file)
Enables the image transparency.
Adds a shading effect to the DEM.
Clips the DEM with a polygon layer. If you have a polygon layer that represents the area that elevation data exist or represents drainage basins, you might want to use this option.
Sides and frame¶
This option adds sides and bottom to the DEM. The z position of bottom in the 3D world is fixed. You can adjust the height of sides by changing the value of vertical shift option in the World panel. If you want to change color, please edit the output JS file directly.
This option adds frame to the DEM. If you want to change color, please edit the output JS file directly.
If you want to export more than one DEM, check the checkbox on the left of child item you want. For example of usage, it may be possible to cover the terrain with supposed terrain surface of a summit level map, or make a 3D heat map.
Some options that are available in main DEM panel cannot be used. Resampling mode is limited to simple. Surroundings, sides and frame options are not available.
Vector layers are grouped into three types: Point, Line and Polygon. Common settings for all vector layers:
Modecombo box has these items:
This item can be selected when the layer geometries have z coordinates and the layer type is point or line.
Relative to DEM
z = Elevation at vertex + addend
z = Elevation at vertex + field value + addend
Only numeric fields are listed in the combo box.
z = value
z = field value + addend
Only numeric fields are listed in the combo box.
The unit of the value is that of the map CRS.
Usually, there are options to set object color and transparency. Refer to the links below for each object type specific settings. The unit of value for object size is that of the map CRS.
Select the features to be output.
All features of the layer are exported.
Features that intersect with map canvas extent
Features on the map canvas are exported.
This option is available with Line/Polygon layer. If checked, geometries are clipped by the extent of map canvas.
Attribute and label
If the export attributes option is checked, attributes are exported with feature geometries. Attributes are displayed when you click an object on web browser.
If a field is selected in the label combobox, a label is displayed above each object and is connected to the object with a line. This combo box is not available when layer type is line.
Point layers in the project are listed as the child items. The following object types are available:
Sphere, Cylinder, Cone, Box, Disk, Icon, JSON model, COLLADA model
Line layers in the project are listed as the child items. The following object types are available:
Line, Pipe, Cone, Box, Profile