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Page Guide: GIS tool (baseline)
Page Guide: GIS tool (baseline)
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Written by Oliver Lewis
Updated today

Summary

On this page, you need to draw the boundary of your habitat parcel. This is the total perimeter of your habitat parcel.

A finished habitat parcel diagram should look something like the picture below - a clearly defined space of land with the same type of habitat.

Please note that, if there is a habitat parcel within a habitat parcel (e.g. a pond) you will need to split the larger habitat parcel into two pieces, for example:

How to use this page

1) When you arrive on this page, you will see a map of the red line you previously drew.

2) Much like the previous step, you can draw the habitat parcel via either the Select OS Features option or the Draw option (automatically selected).

At the bottom of the page is a information box (next to to the undo and redo button) letting you know what the tools you have selected do. To the let of the screen you will see all the previous habitat parcels that you have drawn so far, unticking them will remove the habitat parvel from the map.

Error Information: Self Intersecting Polygons are not allowed

This happens when you draw a habitat parcel outline that intersects itself. These sorts of diagrams are not permitted under the rules.

Suggested steps

  • Try and use the Select OS Features to see if you can draw the site easily

  • Try and draw a basic shape with the draw tool. Then use the Edit tool to amend it to reflect your site's perimeter. There will not an error if you are in edit mode.

Tools on the page

At the top of the page you should see five options:

  • Draw

  • Select OS Features.

  • AutoFill

  • Edit

  • Delete

In the top left of the screen you will see a zoom tool.

In the top right of the screen, you will see a scale

At the bottom of the screen, you will see Undo and Redo tools.

In the right of the screen you will see Advanced Tools, with six options:

  • Angular Snapping

  • Map Features

  • Building Guides

  • Opacity

  • Edit / Adjust Plans

  • Upload Plans

There will also be a Parcel Visibility sub-menu displaying all the habitat parcels you have drawn so far.

How to use the tools on the page

You can tell a tool is active because it will be highlighted in yellow. You should click on the button a second time to turn off the tool.

Basic tools

Draw. Will automatically be selected. This will allow you to draw a polygon onto the map. When this mode is on you will see a blue circle under your cursor.

  • Click on the map to start drawing. You will see a blue dot be placed on the map.

  • Now drag the map in any direction to create a length. As you do so, you will see the size of the length next to the line you are drawing. Simply click to create a corner.

  • One you have created two or more corners, the area will also be displayed.

  • Simply click on the blue dot to complete the polygon.

Select OS Features: When this mode is on, if you move the mouse cursor over a part of the map, part of the map will automatically be highlighted in red. This is based on preexisting information, and may either select your whole site or part of the site. Simply clicking anywhere on the highlighted parcel will result in it being selected (you will see the red line become thick). You can adjust this red line by either going to edit mode, or - if you move the cursor over an adjacent parcel - you will be able to expand by clicking on this parcel. Please note, if you click on a area that is not adjacent, you will start a new red line diagram.

Autofill. This option, when selected, will fill all remaining parts of the red line boundary with the habitat parcel. Recommended for use when you are on your last parcel.

Edit: When this mode is selected, you will see the following information appear:

  • White Boxes. These are all the corners on your red line diagram.

    • You can click and drag these boxes to adjust the shape of the red line diagram.

    • If you click once you will delete the white box (if you do this by accident you can simply hit Undo at the bottom of the page.

  • Grey Boxes. If you click on one of these it will turn into a white box.

  • Angles. Each white corner will have the angle of the corner. As you adjust it you will see this angle change.

  • Lengths. Each length will have a length in metres.

Delete: When this mode is on, simply click on the red line to delete it.

Undo: Click on this button to undo your last action.

Redo: Click on this button to redo your last action.

Advanced tools

Angular Snapping: When you tick this option, you will be able to select an angle

  • 10°

  • 45°

  • 90°

When you select one of these options, when you are using the draw tool, you will always 'snap' to this angle or a multiple of it (e.g. if you select 5°, you will only be able to draw at a 5°, 10°, 15°, 20°... etc angle).

Map Features: When you tick this option, your cursor will automatically "snap" to preexisting map features (e.g. a road, or a site boundary, or feature). This can help to create a very accurate red line diagram.

Building Guides: If you have uploaded a site plan (see below) you can click on the eye icon to show or hide this plan.

Opacity: If you have uploaded a site plan (see below) you can use the scale here to make the site plan more or less transparent.

Edit / Adjust Plans: When this mode is selected, you will be able to

  • Move the site plan by clicking and holding on the image and then dragging it to a new location.

  • Change the size of the site plan by clicking and dragging the corners

  • Spin the site plan by clicking and holding the black dot that hovers over the top part of the diagram

  • Delete the site plan by clicking on the delete icon in the white circule.

Upload Plans: When you click this you will open a window that will allow you to upload your site plan.

You should use the top left hand box (in grey) to upload your site plan (you can either click on the "Browse Files" to select the file from your computer or you can drag the image into your grey box). When selected, you can preview the image and then click Save Files to upload it to your site.

Tree Sizes

Size class

Diameter at Breast Height

Small

Greater than 7.5cm and less than or equal to 30cm

(Saplings smaller than 7.5cm can also be classed as "small")

Medium

Greater than 30cm and less than or equal to 60cm

Large

Greater than 60cm and less than or equal to 90cm

Very Large

Greater than 90cm

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