The map can be zoomed in and out step by step.
Click Zoom in incrementally to zoom in by one step.
Click Zoom out incrementally to zoom out by one step.
The map can be zoomed to cover an area of interest by dragging a rectangle using the mouse.
Click Toggle zoom to activate the zoom by rectangle function. The cursor will change to indicate that the zoom function is activated. To zoom in, click and drag a rectangle on the map using the cursor to enclose an area of interest.
The map can be zoomed in and out by scrolling.
Click the zoom slider and drag towards “+” to zoom in.
Click the zoom slider and drag towards “-” to zoom out.
Alternatively, push or pull the mouse scroll wheel to move
the slider and zoom in or out respectively.
Click Zoom To Selected Features to zoom in on selected features only. If you have selected features on your map, this will zoom to an extent that covers all of them.
The map can be zoomed to the full extent of a given layer
Click Zoom to layer to set the map extent to cover all of the spatial features contained within the specific layer.
The map can be zoomed to an extent covering a feature of interest
Click Zoom to feature to set the map extent to cover a single feature and the area immediately around it. Depending on the baselayer used and the relative isolation of the feature, it may be necessary to adjust the zoom level manually for best results.
Click and drag on the Map using the Pan tool to move the area of interest without zooming.
The map baselayer can be toggled between standard and satellite imagery
Click Satellite to switch between the standard baselayer and satellite imagery. The satellite baselayer contains more detail in the ocean bed topography than the standard baselayer.
The map legend may be displayed in a constrained or free window
Click Display Legend to open a window containing the map legend. The window will contain the symbols for all currently visible layers on the map and be updated as layers are added and removed. In its default state the map legends window is constrained to the main browser window.
Click the controls in the window border to close it or to free it as a separate browser window.
The layer groups panel may be minimised to the side of the window
Click Minimise panel to minimise the layer groups panel to the side of the map window.
The previously minimised layer groups panel may be re-displayed at the side of the map window
Click Show panel to re-display the layer groups panel at the side of the map window.
Groups of layers may be expanded or collapsed
Click on “ + ” in the layer group header to expand the group and reveal the layers. The “ + ” will change to a “ – ” to mark the change. To collapse the group click on “ – “. Expanding and collapsing layer groups does not affect which layers are active.
All visible layers within a group can be toggled off or on in the following way
Click Toggle group to hide layers from a particular group without removing the layer-selections within the group. This option is only available if there are active layers within the group and the Toggle group button will be green to indicate this.
Clicking once more will reactivate the same selection of layers as were active before the group was toggled off. Any spatial features that were selected before toggling the layer group off will be unselected when the layer group is toggled on again.
Additional information about any layer can be displayed
Click Layer information to open a window containing additional information, such as layer source, last update, frequency of update, a description and the symbolisation of the layer. The window will be bound to the main browser window.
Layers can be made visible and active by expanding the relevant layer group and clicking the layer name. Only features on active layers can be selected spatially.
Clicking the Toggle current selectioncontrol / in the Layer group header toggles the layer visibility off or on without affecting which layers are active. Only layer groups containing active layers can be toggled in this way.
Note: the application will be most responsive with few visible and active layers.
Display the attributes belonging to all the features in a layer
The table of layer features opens whenever at least one layer is visible on the map.
For each displayed layer, the attributes belonging to the features of the layer can be displayed by clicking the table tab corresponding to the layer name.
Click Hide Non-Selected Features to hide features from visible layers that have not been selected. This option is only available if features exist in a visible layer and they have not been selected or hidden. Hiding features is useful if you have many layers open and have selected some features from multiple layers. By hiding the non-selected features, the displayed map will only show relevant items.
Click to re-display all features from visible layers.This control replaces the hide non-selected features control if any features have been hidden in visible layers.
This tool is available if you have active selections Click to remove them without affecting active layers or extent.
Items of interest can be selected or deselected from the table of features for the layer
To select an item of interest from the table of features for an active layer, click once on the table row describing the item of interest. The line will be highlighted to indicate selection and the relevant spatial feature will also be highlighted on the map. Clicking on any selected row in the same table deselects the feature on the map and removes its highlighting on the map and in the table.
Selected feautures can be brought to the top of the layer table
Click Bring selected features to top to bring any selected/highlighed features to the top of the layer table. This makes it easier to identify which features have been selected and to locate them on the map. The action will only be available if features have been selected.
The table of layer features may be minimised to the bottom of the window
Click Minimise table to minimise the table of features to the bottom of the map window.
The control is available at the top righhand side of the table and, as a downward pointing arrowhead, in the middle of the table/map border below the map.
The minimised map layer table may be redisplayed, below the map.
Click Show table to re-display the previously minimised table of features at the bottom of the map window. The table will be blank if no layers are visible.
The map layer table may be undocked from the map
Click Undock table to tear off the table of layer features from underneath the main map. The table will open in a separate browser window independent of the main window. Close the table window to re-dock the table under the map.
Selected spatial features may be exported from the map.
For logged-in users, a spatial selection may be exported to Microsoft® Excel®, kml (Google Earth™) or shapefile. After making the selection, click Export to. A dropdown menu appears containing the possible export types. Click to choose an export type and the spatial selection will be passed to the browser for handling. Depending on browser settings, the spatial selection will then be saved to disk or opened by the respective helper application.
Sorting the table of features can be achieved using one of two methods.
Method 1.Sort by clicking on the column header for the attribute by which to sort. The first click will sort the table in order of the chosen attribute, ascending. The second click will sort the table in order of the chosen attribute, descending.
Method 2.Activate the context menu for the attribute by which to sort by hovering the mouse over the column header and clicking the arrowhead to the right. Then select the Sort Ascending or Sort Descending tool, as required.
The attributes to be displayed in the layer features table can be selected
Activate the context menu for any table column by hovering the mouse over the column header and clicking the arrowhead to the right. Then hover the mouse over the Columns submenu to see the list of available columns. Select columns for display by ticking the checkboxes beside the column names or remove the ticks to hide the columns.
The columns in the layer features table can be freely resized to display their content
Hover the mouse over the column header separator to the right of the column to be resized. The cursor will change to indicate that the column can be resized. Now click and drag the mouse to change the width of the column.
A spatial selection can be made based on the geometry of a single spatial feature.
Querying all visible layers for features enclosed by or intersecting a single feature is done by clicking on the Query by Geometry link displayed to the right of the item of interest in the layer features table, located below the Map.
Display the attributes belonging to a single feature.
Click Feature info to display the attributes of the feature of interest in a floating box. This can be useful to display the attributes of a specific feature only, without the rest of the layer features table. The layer features table will remain visible unless explicitly minimised or hidden.
Map layers can be queried by Spatial Selection or by Text Search.
The Spatial Selection tool is used to query active layers on a map by enclosing the region to be queried in a rectangle. When the tool is active, the icon image changes from dark blue to white. Features returned by the spatial query will be highlighted in the table below the map and move to the top.
Map layers can be queried by Text Search or by Spatial Selection.
Entering text into the Text Search field will return a list of possible hits. Hits will be refined as more text is entered. This search returns an exact match to the text entered and therefore Wildcards and Operators are not allowed. Text matches will appear below the entered text in the column to the left. The column to the right displays the map layer containing the result. Clicking on a result will redraw the map centred around that result.
Submitting a search query using the Wheroil Map can be achieved using one of two methods.
Method 1.Sending a single spatial feature to search by clicking on the Send to Search link displayed at the right hand side of items in the spatial feature table, located below the Map.This table contains descriptions of all features displayed on the map.
Method 2. Sending all selectedfeatures by clicking on the Send to Whereoil Search tool to send the items of interest to the Search.
To start Wheroil Map from the Search application without sending any search results to Map, click on the Map icon located in the upper centre of the screen.