Figure 1: Opening View of EPA Unified GIS Application
The EPA Unified GIS Application is a new framework for all our GIS. It offers the possibility to select different configurations from one application. Currently, there are only two configurations available; EPA Maps and Sewage Treatment, but in time, all EPA GIS applications will be included. The application provides a library of spatial data layers and a host of functionality, including the following:
· Spatial Data Layers
· Search Tools
· Identification of Features
· Measurement and Graphic Tools
The new application can be accessed using the link: https://gis.epa.ie/EPAMaps/
The EPA Unified GIS Application layout consists of a theme toolbar at the top of the window, a side menu and navigation tools. The application currently holds two different configurations; EPA Maps and Sewage Treatment. Figure 2 below provides a visual guide for the EPA Maps configuration and figure 3 provides a visual guide for the Sewage Treatment configuration. Click on the application drop down menu as shown in figure 2 to switch between the EPA Maps and Sewage Treatment configurations.
Figure 2: Overview of EPA Maps within EPA Unified GIS Application
Figure 3: Overview of Sewage Treatment Configuration within EPA Unified GIS Application
The functionality of the four buttons on the left hand side of the screen will be described later on in this document. The links to these sections are below:
The navigation tools allow the user to zoom in or out, move around the map or view the entire country. The navigation tools are grouped together in the bottom right corner of the application (Figure 4) and are always visible. The functionality of each navigation tool is described below.
Figure 4: Location of Navigation Tools
The Zoom to Ireland button will change to
map view to be the full view of the Ireland (as shown in figure 3 above).
The Zoom to Location tool is currently disabled. When it is enabled, it will zoom to the user’s current location based on GPS.
Clicking on the Zoom In button will zoom in on the map. This can also be done by wheeling the mouse wheel up or double clicking on the map.
Clicking on the Zoom Out button will zoom out on the map. This can also be done by wheeling the mouse wheel down.
The Export map as image button is located in the bottom right corner of the application, next to the navigation tools (Figure 5).
Arrange the map view as desired and click the Export map as image button. This will automatically download the map as a .png image which can be found in the Downloads folder (Figure 6).
Figure 5: Location of 'Export map to image' button
Figure 6: Export map to image example
The Base Map Menu button is located on the right hand side of the mapping application, above the navigation tools (Figure 7). At the moment there are two base map options: OpenStreetMap and Water Colour. These options can be selected by hovering over the Base Map Menu button as shown in figure 7 and clicking the base map of your choice.
Figure 7: Location of Base Map Menu button
The Search Tools provide the option to search by County/Town, Address or a set of Coordinates. Click the Magnifier icon in the theme tool bar to open the Search Tools (Figure 8).
Figure 8: Accessing Search Tools from Theme Toolbar
In the County/Town tab of the Search Tool (Figure 9), search for a County by making a selection from the first drop down menu and the map will zoom to that county. Search for a town by first selecting a county and then selecting a town from the drop down menu. The map will zoom to the centre of that town.
Figure 9: Search by County/Town
In the Address tab of the Search Tool (Figure 10), begin typing the address you are interested in into the search box and a selection of results will begin pop up. Click on the appropriate result and the map will zoom to that location. You may also search by EirCode.
Figure 10: Searching by Address
In the By Coordinates tab of the Search tool, the user can search for a location by entering a set of coordinates in WGS84, Irish National Grid or Irish Transverse Mercator (Figure 11). Once you have chosen your coordinate reference system, enter the Easting/Northing or Latitude/Longitude coordinates and click Find Location. The map will zoom to the coordinate’s point location and a marker will appear on the map provided that the coordinates entered are valid.
Figure 11: Searching by Coordinates
This section explains how to:
· Access and display data on the map
· Access the legend for this data
· Use the query/filter tool
· Order layers
· Identify features
There are two ways to access spatial data layers in the Sewage Treatment Application:
A) From the top Theme Toolbar
B) From the GIS Library
To access layers from the Theme tool bar, hover over a theme e.g. Land & Soil (Figure 12).
Figure 12: Hovering over Theme Toolbar
Then click on one of the layers within the theme to turn it on, e.g. Subsoils. The slider will turn green (Figure 13).
Figure 13: Turning on layer from Theme Toolbar
The dataset will appear on the map. Notice how the Active Layers tab now has an icon with the number beside it, this means that there is one active layer on the map.
If you wish to turn the layer off and remove it from Active Layers, click the slider button again.
The Theme Toolbar is designed to give access to the layers of most relevance to the current configuration of the application. Additional data layers that are not available in the Theme Toolbar can be accessed via the WMS Layers (Figure 14). This tool allows you to search for all GIS layers in the system, currently there are >290 layers of data. Clicking this button will open up a search box.
Figure 14: WMS Layers
Type the name of the layer you’re interested in into the search box to begin searching for the dataset. The library will filter to show relevant datasets. Turn on a dataset by clicking the slider button (Figure 15). The layer will then appear in the Active Layers tab.
Figure 15: WMS Layers Search Tool
Vector tile layers can be accessed as shown in figure 16. Currently, there are only two layers available in the Vector Layers; EPA Offices and Counties, but we are working to extend this functionality to all data layers.
Figure 16: Vector Layers
The Vector Layers provide information for a feature by hovering over the feature on the map with the mouse cursor (Figure 17).
Figure 17: Vector Layer Feature Details
To access the metadata for a dataset, click on the Information icon as shown in figure 18. This will open a new window containing a metadata abstract. A link to the full metadata can be found at the end of the pop up window. Clicking this link will open the full metadata in the EPA Metadata Catalog in a new tab of your browser.
Figure 18: Accessing Layer Metadata
If you do not see any data on the map after turning on a layer, then the layer has a scale dependency applied. The on/off switch for these layers will appear greyed out in the Active Layers list. To view the data you must zoom in or out to a different scale (Figure 19).
Figure 19: Changing Scale to Turn on Certain Layers
The Active Layers tab provides a single area to view and control the layers.
The legend can be accessed by clicking the Show Advanced Layer Setting, as shown in figure 20. The legend will be displayed under the legend heading. This provides a description for the data on the map.
Figure 20: Showing 'Advanced Layer Settings' and Layer Legend
The Filter tool can be used to show a subset of a dataset’s features on the map. Make sure the layer you wish to filter is present in the Active Layers window. Select the Show Advanced Layer Settings cog for that layer (Figure 20).
Click the Filter icon in the Active Layers window (Figure 21).
Figure 21: Filter Tool
Next, click the Select Attribute drop-down (Figure 22). Specify the attribute you wish to perform the query on. In this example we are interested in Latest Compliance data for Bathing Locations so we will choose ‘Latestcompliance’ from the Select Attribute drop-down (Figure 22). We require ‘Excellent Waters’ so we can select Like from Select Operator drop-down (Figure 22). Next we can type “Excellent” or more specifically “Excellent Water Quality” in the Search box (Figure 22).
Figure 22: Filter Parameters
Click the Add Filter icon (Figure 23). Note that the text must be entered correctly (as shown in the Layer Legend).
Figure 23: Add Filter
The filtered data will be displayed on the map. To remove this filter, click the Remove Filter icon shown in figure 24.
Figure 24: Remove Filter
The Filter tool can be used to search for a particular record within a dataset. In the following example we will use the Filter tool to find a specific waste facility. From Select Attribute drop down select the attribute you are interested in, e.g. Regcd. For Select Operator we can specify Like. In the search box we can type “W0070” for example. Next, click Add Filter as shown in figure 25. Only the facility W0070 will be shown on the map for this layer.
Figure 25: Add Filter for Query
It is possible to update the layer symbology for some layers in the application. Note that this is not yet available for many layers, but work is currently underway to extend this functionality to more layers.
Default symbology is currently configured within the Active Layers under Layer Symbology (Figure 26).
Figure 26: Default Layer Symbology
Click the Layer Symbology drop down to see what other symbology is available. Special Areas of Conservation (SAC) for example currently has alternative symbology available that can be chosen (Figure 27).
Figure 27: Alternative Symbology
In the Active Layers window it is possible reorder how the layers are shown the map.
Click the up/down icon beside a layer to move it up or down the list in Active Layers (Figure 28).
Figure 28: Reorder Layers in Active Layers window
If you want to keep a layer in your list but wish to turn it off momentarily, simply click the on/off icon (Figure 29).
Figure 29: Turn On/Off Layer
If you wish to remove a layer from Active Layers click the Remove Layer button (Figure 30).
Figure 30: Remove Layer from Active Layers
Layer Transparency allows the features beneath a dataset to become visible, while allowing partially transparent features to be visible also. There is a transparency slider within the Advanced Layer Settings for each layer in the Active Layers window (Figure 31).
Figure 31: Transparency Slider for Active Layers
It is possible to identify information about individual features from the Active Layers visible on the map.
Simply click on a feature on the map and the Results window will open with the returned feature. Click the Show/Hide Details icon to expand the result and find more information about the record (Figure 32).
Click the Pin icon to zoom to a selected feature.
Remove a feature using the Bin icon.
Figure 32: Show/Hide Feature Details
If you wish to identify a more than one feature, ensure the Keep Previous Results is switched on (Figure 33).
Figure 33: Identifying Multiple Features
Scroll to the end of the Results window, and click the Export icon.
This will download a comma-separated values (.csv) file containing the features shown in the Results window, which can be opened in Excel.
Please note a separate CSV is generated for the features in each layer (Figure 34).
Figure 34: Export results
To delete all results and close the results window, click the Clear All Results icon as shown in figure 35.
Figure 35: Remove feature from results
The Tools are accessed from the side menu as highlighted in figure 36. The Search Tools, Measurement Tools and Graphic Tools are the Standard tools and are always available in the application regardless of which configuration you have selected. Other tools are only available in certain configurations. There are standard tools are outlined in detail below.
Figure 36: Tools access from side menu
Each tool has an option to minimise the tool after it has been opened (Figure 37) or close the tool (Figure 38).
Figure 37: Minimize Tool
Figure 38: Close Tool
To access the Search Tools click Tools and then Search Tools as shown in figure 39.
Figure 39: Search Tools
For a guide on how to use each of the search tools please refer to the following sections of this document;
The application contains Measurement Tools which provide options for measuring Line distances, shape areas and the functionality to retrieve coordinates from the map.
To open the Measurement Tools, click Tools and then Measurement Tools (Figure 40).
Figure 40: Measurement Tools
To measure distance on the map, open the Measurement Tools and click Measure Distance within the Measurement Tools (Figure 41).
Figure 41: Measure Distance Tool
Next, click the map where you wish to begin measuring. Click once on the map to change direction. Double click to define the end location for the distance.
A line will appear on the map with the distance shown in meters/kms (Figure 42).
Figure 42: Measure Distance Example
Figure 43: Measure Area Tool
Next, click the map where you wish to begin measuring. Click a number of points on the map to draw an area, followed by a double click on the last point to finish measuring the area.
A shape will appear on the map with the area shown in m2/km2 (Figure 44).
Figure 44: Measure Area Example
To get a set of coordinates for a location on the map, open the Measurement Tools and click Get Coordinates within the Measurement Tools (Figure 45).
Figure 45: Get Coordinates Tool
Next, click on a point on the map you wish to get the coordinates for.
The results will appear in the Measurement Tools window (Figure 46) in the following formats:
· Irish National Grid (Easting, Northing)
· WGS84 (Latitude, Longitude)
· Irish Transverse Mercator (ITM Easting, ITM Northing)
Figure 46: Get Coordinates Tool Example
To clear the measurements you have placed on the map, click the Clear Measures Tool within the Measurement Tools (Figure 47).
Figure 47: Clear Measures
The Graphic Tools provide the option to add various shapes to the map as graphics. Graphic tools can be useful for highlighting certain features of interest.
Click Tools and then click Graphic Tools (Figure 48).
Figure 48: Graphic Tools
To add a circle graphic on the map, first choose the Line Colour and Fill Colour for the circle, and then click on Circle within the Graphic Tools (Figure 49).
Figure 49: Add Circle Graphic
Next, click on the map where you wish to place the centre of the circle and scroll the mouse inwards to increase the size of the circle or outwards to decrease the size of the circle.
A left click will finish the circle (Figure 50).
Figure 50: Example of Circle Graphic on Map
To draw a line on the map, first choose the Line Colour and Line Width and then click on Line within the Graphic Tools (Figure 51).
Figure 51: Line Graphic Tool
Next, click on the map where you wish to place the start of the line. Click once to change direction. Double click to finish drawing the line (Figure 52).
Figure 52: Line Graphic Example
To draw a polygon on the map, first choose the Line Colour and Fill Colour and then click on Polygon within the Graphic Tools (Figure 53).
Figure 53: Polygon Graphic Tool
Next, click on the map where you wish to start drawing the polygon and continue to click points on the map to create the polygon. Double click to finish drawing the line (Figure 54).
Figure 54: Polygon Graphic Example
To add text to the map, first choose the Text Size and Line Colour, and then enter the text into the Text Label box (Figure 55).
Click Add Text.
Figure 55: Add Text Tool
Click on a point on the map to add the text to that location (Figure 56).
Figure 56: Add Text Example
The edit graphic tool provides the option to go back and edit an existing graphic on the map.
Click on the Edit button and click on a graphic on the map (Figure 57).
Figure 57: Edit Graphic Tool
The select and delete graphic tool provides the option to delete a graphic from the map.
Click on the Select & Delete button and click on a graphic on the map (Figure 58). You will be prompted to confirm that you wish to delete the graphic you selected. Click OK.
Figure 58: Select & Delete Graphic Tool
Should you have any queries regarding the functionality in this document or within the application, please contact the GIS Team for support: http://gis.epa.ie/ContactUs