Catchment Guide - Analyse

 

Finding out what features fall within your Catchments 

 

Video Guide

Step One

Access the Catchment layer tools - To access the Catchment Tools to analyse your own Catchment layer, Open an existing project and then select My Data, click on the Catchment layer you wish to analyse.

Step Two

Select Catchments to look at - In the Select section of the panel, you can control whether to look at all Catchments in the layer or just a single Catchment. If you want to run the What’s In My Catchments? process on all Catchments, make sure that the All button is selected. To select an individual Catchment, click on the Catch button, then start to type the Catchment Identifier in the text box and select the required Catchment from the drop down list. 

Step Three

Open the What’s in My Catchments? tool - To open the ‘What’s in My Catchments?’ tool, open the Tools section and select What’s in My Catchments?

Step Four

Select the layers to investigate - Click on the dropdown box to select a layer. You can add up to 5 layers at a time by pressing the + button. If you need to remove one of the layers press the button. Once you have selected the required layers press Calculate

Step Five

Agree to save changes to your Catchments layer - A message will be shown to warn you that the process may take a while to complete and that the changes will be saved to the layer. Press Yes to continue. 

Step Six

Open the data grid - After clicking Calculate, the system will use your Catchment areas to ‘cut through’ the layers you have selected and find out what falls within each Catchment area. To view the results, click on the Data View icon at the bottom left of the map. 

Step Seven

View the results of the ‘What’s in My Catchments?’ process - You will see a list of all your Catchments and the data associated with them. To view which features fall into a Catchment, click on the + button which can be found on the left hand side of your Catchment’s details. To close this detailed level, press the button. 

Finding the distance of features from Catchment centres 

 

Video Guide

Step One

Access the Catchment layer tools - To access the Catchment Tools to analyse your own Catchment layer, Open an existing project and then select My Data, click on the Catchment layer you wish to analyse. If you want to find out which of your own features fall into your Catchments you will need to have these setup as another layer in your project. 

Step Two

Select the ‘What’s in My Catchments?’ tool - Before you can calculate the distance of any features from the centre of your Catchments you need to find out which features fall into each of your Catchment areas. To do this you can run the ‘What’s in My Catchments?’ tool. Open the Tools section and select What’s in My Catchments? 

Step Three

Select the layers to investigate - Click on the dropdown box to select the layer that contains the features you want to investigate (for example your stores or a standard layer from the SKiN system). Once you have selected the required layer press Calculate

Step Four

Run the ‘What’s in My Catchments?’ process - A message will be shown to warn you that the process may take a while to complete and that the changes will be saved to the layer. Press Yes to continue. The system will use your Catchment areas to ‘cut through’ the layers you have selected and find out what falls within each Catchment. 

Step Five

Access the Calculate Distances tool - To access the Calculate Distances tool, open the Calculate Distances section of the Tools panel. Tick the Straight Line Distance box which will mean that the system will calculate the shortest straight line distance from each feature to the centre of the Catchment that it falls into. Press Calculate to run the process. 

Step Six

View the results of the calculate distance process - To view the results, click on the Data View icon at the bottom left of the map which will open the data grid. You will see a list of all your Catchments and the data associated with them. To view which features fall into a Catchment, click on the + button which can be found on the left hand side of your Catchment’s details. You will see a column showing the calculated distances for each of the distance types you selected. To close this detailed level, press the button.       

Scoring Catchments based on their data 

 

Video Guide

Step One

Access the Catchment layer tools - To access the Catchment Tools to analyse your own catchment layer, Open an existing project and then select My Data, click on the Catchment layer you wish to analyse. 

Step Two

Select all Catchments - Before the Scoring tool can be accessed, all Catchments in the layer must be selected. To check this, open the Select section of the panel and make sure that the All button is selected. 

Step Three

Select the scoring tool - To select the Scoring tool, open the Tools section of the panel and select Scoring

Step Four

Select drivers to base the scoring on - Any of the numeric columns associated with your Catchment layer can be used as a driver to calculate a score for the Catchments. To select a column for the first driver, click in the dropdown box under DRIVER 1 and select a variable. You can then add up to 9 additional Drivers by pressing the + button and selecting another variable.       

The weighting of each driver can be set to allow different drivers to be weighted according to their importance. For example a weighting closer to 100 means that the variable is of greater importance and a variable of weighting 50 is half as important as a variable of weighting 100. To change the weighing click and drag the bar to the required position.       

Step Five

Change Scoring settings - By default, the system will generate 5 classes using the Natural Breaks method to assign scores of between 1 and 5 for each driver for each Catchment area. These scores are then multiplied by the weightings and normalised so that each potential Catchment area is given a final score out of 100. If you wish to change how the scoring is setup, you can use the Advanced Options section by clicking on Advanced Options.      

Number of Classes – to change the number of classes for your scoring method, enter a value into the Number of Classes box.      

Classification Method – click on the dropdown to select a classification method to base the scoring on.

To return to the main Scoring panel press the Layer arrow. 

Step Six

Run the Scoring process - You can choose to overwrite the colour styling of your Catchments based on the results of the Scoring by ticking / unticking the Overwrite Styling box. If this box is ticked your Catchments will be shaded based on the score given to each catchment after the scoring process has been run. To run the process press Score and choose Yes when prompted, to confirm that you wish to run the process. 

Step Seven

View the results of the Scoring process - To view the results, click on the Data View icon at the bottom left of the map which will open the data grid. You will see a list of all your Catchments and the data associated with them. There will be a Score column for each driver that you selected to use and then an overall Score for the Catchment, There will also be a Rank column which will rank each Catchment in order of their score, with the Catchment that has the highest score having Rank 1.       

Step Eight

View Catchment shading - If you ticked Overwrite Styling before running the Scoring process your Catchments will be shaded in red, amber or green based on their total Score. This will help you identify areas of highest potential at a glance. 

Analysing the impact of overlaps with a Catchment

 

Video Guide

Step One

Select the Catchment layer to analyse - To analyse your own Catchment layer, Open an existing project and then select My Data, click on the Catchment layer you wish to analyse. 

Step Two

Select a Catchment - To look at the areas which overlap with a particular Catchment, you firstly need to select the Catchment you want to look at. Open the Select section, click on the button next to Catch and start typing the first few letters of your Catchment identifier in the box. When you can see the required Catchment in the dropdown list, click on it to select it. 

Step Three

Access the Overlap Analysis tool - To select the overlap analysis tool, open the Tools section and select Overlap Analysis

Step Four

Compare your Catchment - You can either compare your selected Catchment to other Catchment areas in the same layer or you can compare against Catchment areas in a separate layer.  To measure the impact of the overlap, you can either consider the Surface Area that is overlapping or you can measure the overlap using Data such as population. Select the required options and then press Calculate

Step Five

Analyse the overlap results - After clicking Calculate, the system will create a new overlap layer which has a row in the Data View for each Catchment that the selected Catchment overlapped with. Each overlap will show the Primary Catchment (your original selected Catchment), the Secondary Catchment (what your Catchment overlapped with) and the data associated with the Catchments and the overlap. 

Using the Analogue Comparison tool 

 

Video Guide

Step One

Access the Catchment layer tools - To access the Catchment Tools to analyse your own Catchment layer, Open an existing project and then select My Data, click on the Catchment layer you wish to analyse. 

Step Two

Select a Catchment to compare - To select the Catchment for which you would like to find comparable Catchments, click on the Catch button in the Select section of the panel and start to type the identifier of your Catchment, and then select the required Catchment from the dropdown list. 

Step Three

Open the Analogue Comparison tool - To access the tool, open the Tools section and select Analogue Comparison. 

Step Four

Choose the Analogue Comparison settings - You can either compare your Catchment to other Catchment areas in the same layer by leaving This Layer selected, or you can compare against Catchment areas in a separate layer by clicking on the button next to Layer and selecting a layer from the dropdown list. All other Catchment layers that are in your project will be included in the dropdown list.    

Sales Column: To enable you to assess the Sales of the top 3 analogue sites you must select a Sales column from the drop down list.       

Column: Select the attributes which you would like to use in the analogue comparison. Each attribute can be weighted by using the slider according to its importance as a comparison factor. To add additional attribute columns press the + button.      

Press Calculate to run the analogue comparison. 

Step Five

View the results - To view the results open the Data View by clicking on the data grid button. You will see the details of the Catchment that you selected in the first row and then a table of 3 sites which the system has calculated as being the top 3 sites that are most similar to the site (Catchment) that you are looking at.       

It will show the percentage match of each of the variables that you selected to use in the analogue comparison and also the sales value of each of the sites. This is intended to give you an estimation of the sales prediction for your site. 

How to combine or split Catchments 

 

Video Guide

Step One

Access the Catchment layer tools - To access the Catchment Tools to analyse your own Catchment layer, Open an existing project and then select My Data, click on the Catchment layer you wish to analyse. 

Step Two

Select all Catchments - To use the Combine & Split tool you need to firstly make sure that all Catchments are selected. Open the Select section of the panel and click on the All button if this is not currently selected. 

Step Three

Open the ‘Combine & Split’ tool - To open the Combine & Split tool, open the Tools section and select Combine & Split

Step Four

Select the Catchments to combine - To select the Catchments that you would like to combine into one Catchment, zoom (using the zoom tool with the magnifying glass icon above the map) into the area around the Catchments that you would like to combine, then click on Select (in the Combine & Split section) and click on each of the Catchments that you would like to combine. You will notice that the selected Catchments are highlighted in yellow. Press Combine to create a combined Catchment.

Step Five

Select Catchments using the polygon or radius method

An alternative way of selecting the Catchments that you would like to combine is by using the Polygon or the Radius method. To use the polygon method, click on Polygon and click around the Catchments that you wish to combine, click the first point to close the surrounding polygon and then press Combine. To use the radius method, click on Radius and then click on the map and drag a circle around the Catchments that you want to combine. 

Step Six

Split your overlapping Catchments - To split Catchments to create unique areas, select the Catchments using one of the three selection methods Select, Polygon or Radius and press Split

Step Seven

View your combined or split Catchments - After combining or splitting your Catchments you can open the Data View by pressing the data grid icon at the bottom left of the map. You will notice that extra Catchments have been created. Where Catchments have been combined, there will be one new Catchment, prefixed with the word Combined. If you have split two Catchments, the system will have created 3 new Catchments; a unique area of the first Catchment, a unique area of the second Catchment and an overlap of the 2 Catchments.