Welcome to our map of the Pre-European Settlement Vegetation of the Chicago region


This is pretty easy to use, but there are a few things you need to be acquainted with.


Pan/Zoom/Full Extent:

Pan – use the arrow buttons to pan; you can also click anywhere on the map and that point will become the new map center

To zoom in or out, drag the button on the slider bar or click on the zoom in/out buttons located above and below the slider.  You can also draw a “zoom to” box using the magnifying glass tool; click tool to activate (double click in Firefox).

Full extent – returns to the full extent of the map




Browse/Identify Point/Search Trees:


NOTE: the only searchable feature is trees

Browse – in this map mode, you can zoom or pan

Identify trees – with this button selected, you can click on a point and find out what it is (you must be zoomed in far enough to click accurately). NOTE: when you are in “identify point” mode, you won’t be able to zoom or pan.

Search trees – select this button to query using different tree attributes.

You can also use the “select box” tool to select one or more trees by drawing a box around them. Click tool to activate (double click in Firefox).








Information about selected trees (points displayed in yellow highlight) will be returned in a table below the map.  The “zoom to” map in query results opens in a new window, showing you the location of that particular tree.


Note:  You can only be in one map mode at a time.  In browse, queries don’t work.  If you are identifying a point, the zoom won’t work; However, the zoom does function when querying tree records.


Layers – other selected layers will be drawn on top of the background.

The section lines only appear when you are zoomed in far enough

Select query term – the drop-down menu lets you choose from various search options; after you select a search term, the choices for that term will be loaded into the blank box on the right.  Choose a search item and click “refresh map”

Layers and query terms:


Trees selected by your query will be displayed in yellow.  Queries resulting in multiple results will generate a table you can export to excel (scroll to the bottom of the table).  The maximum number of results for a table is 500; if there are too many records, no table will be returned.


Click on “printable map” at the lower left to get a pdf of your current display


Tree density values are trees per hectare (for more information about the notes this map is based on, please see the “Pre-European Settlement Vegetation” page on this website http://www.plantconservation.us/plspub.html).  Line tree densities are always 0, as we do not use this data type to estimate tree density.


Questions and comments should be directed to:

meadii@plantconservation.us  Thanks for trying this out!  Jenny