Archives of Ontario RG 1-100 Patent Plans Update

Back in 2014 the Archives of Ontario released downloadable high resolution images of the RG 1-100 Patent Plans of townships in Ontario and there was much happiness. Fast forward to 2022 when the Archives of Ontario Archives Descriptive Database was replaced with the new Archives and Information Management System (AIMS), suddenly all those high resolution images disappeared. There was much weeping and gnashing of teeth. To view those high resolution images we would have to ask the staff at the Archives of Ontario to send them to us. And yes, I would politely email the reference desk once a year asking if the folks who ran AIMS were ever going to fix this problem.

Well, we can now celebrate once again.

Before diving into the reason for our collective celebration, you might be wondering what I'm writing about. The RG 1-100 Patent Plan series of document held by the Archives of Ontario often have the earliest "maps" of settlement for places in what became known as Ontario. On those plans we might come across the names of those who received a patent from the Crown as the first settler/owner of a lot.

Recently the Archives of Ontario updated their site¹. As I was looking at some of the updated pages, on their "Crown land – Patents" page I came across little nugget:

Find patent plans online

Access high-resolution copies of most of our patent plans online for free through the University of Toronto’s Map and Data Library.

You can:

1. Use the searchable list of patent plans to find a plan by title. Select a plan to start downloading the high-quality .tif file.
2. Search for plans using an interactive online map. Plans have been georeferenced using their latitude and longitude and can be found on the map in the location they depict.

When we visit the Ontario Archives Patent Plans Collection hosted by the University of Toronto we get a list of 3996 items in their collection. We can then start typing in the name of the township to whittle down the list to something a bit more manageable, especially since the list doesn't seem to be sorted alphabetically.

I have run into a few quirks with this page when I filter by the township or place and it all depends on which web browser I'm using.

• If I'm using Firefox, if there is no thumbnail image being shown then the text in the first column overlaps with the text in the second column. That text in the first column appears to be the "alt" text for the image and Firefox is showing you all that text.
• If I'm using Chrome, if there is no thumbnail image being shown then I get the "broken image" icon and the alt text is truncated to fit in the column

No matter which browser you are using, you can click on the thumbnail image or text to download the high resolution image to your computer for viewing and/or saving. Just a heads up...those images aren't small JPG images like we normally see on websites. Instead, each of the images are TIF files and can be easily between 80 to 250 MB in size. 

Let's take a look at an example. 

We can search the Archives of Ontario AIMS database for these RG 1-100 Patent Plans by doing the following:

• Select Archival search from the left panel of the "Search the Archives of Ontario"page.
• Under the search box, click on the "Archival advanced" link on the "Search archival collection" page.
• On the Archives advanced search screen:
• Put "RG 1-100" (no quotes, but the space after the "RG" is important) in the "Higher-level reference code" box.
• Put the name of the township you looking for in the "Title" box. e.g. Drummond
• Leave all the other search boxes empty.
• Click the Search button at the bottom of the page and hope the search is working².

When I did a search for Drummond Township it returned 5 results. I picked "Township No. 2 or Drummond, Blotter Plan" as the one I wanted to look at in this example.

Screen capture of the Archives of Ontario details page titled "Township No. 2 or Drummond, Blotter Plan", RG 1-1000-0-0-160.

There we see that the Reference Code is "Item RG 1-100-0-0-160" and the title is "Township No. 2 or Drummond, Blotter Plan". Useful details for our source citation.

If we click on the image on the page, we can only view the low resolution version of that patent plan. Zooming in using the magnifying glass with the "+" symbol in the upper right corner of their viewer only gives us an unreadable image since everything is blurry. That image is fairly useless for our purposes of reading what is written on them.

Using the new "Ontario Archives Patent Plans Collection" page hosted by the University of Toronto we can filter on the title for that patent plan we found in AIMS. 

Screen capture from Chrome of the "Ontario Archives Patent Plans Collection" page hosted by the University of Toronto with Drummond as the title or plan name.

We can see that title in the list but the thumbnail is showing a broken image icon. No problem, click either on the broken icon or the title and, depending on your browser setup, the image will appear in your browser or you will be prompted to save it to your computer. I always recommend saving it to your computer so you don't have to go through this exercise each time you want to look at the patent plan.

In the case of that "Township No. 2 or Drummond, Blotter Plan" image, the image is 9648 x 7784 pixels. That would be about 81 x 65 cm if printed out assuming 300 DPI. The file size is over 200 MB. What I would call "big".

Township No. 2 or Drummond, Blotter Plan, digital images, University of Toronto Maps and Data Library, Ontario Archives Patent Plans Collection (https://maps.library.utoronto.ca/datapub/Ontario/PatentPlans/PatentPlansOntario/PP.html# : accessed 29 Oct 2025); citing Archives of Ontario, RG 1-100-0-0-160.

This is the map zoomed in about 85% and I can clearly read that one of the settlers on Lot 16 in the Second Concession of Drummond is recorded as "Corp^l Alex Fraser 49 Reg^t. Oct. 1816". That's my 4th great-grandfather.

Township No. 2 or Drummond, Blotter Plan zoomed in at 84.2% using Irfanview showing Alex Fraser as a settler on Lot 16, 2nd Concession, digital images, University of Toronto Maps and Data Library, Ontario Archives Patent Plans Collection (https://maps.library.utoronto.ca/datapub/Ontario/PatentPlans/PatentPlansOntario/PP.html# : accessed 29 Oct 2025); citing Archives of Ontario, RG 1-100-0-0-160.

If I hadn't already known that Alexander served in the 49th Regiment of Foot, I would have learned a new fact about his life. If I was researching Nathaniel Stedman, from this patent plan I would have learned that he probably emigrated in November 1816. Keep in mind, that most patent plans don't have this sort of detail. For example, in another patent plan for Drummond, RG 1-100-0-0-474 "Drummond ~ County of Lanark", it just has the names of people with no other details.

I have run into a few cases where I get the dreaded 404 error when I try to access a patent plan. When that happens, I hold my breath, count to ten, and try again. I can usually then access the patent plan.

 

We can also use that other link provided on the Archives of Ontario "Crown land – Patents" page which points to the "Ontario Patent Plan Access" site.

Screen capture of the Ontario Patent Plan Access index.

Each of the dots on the map is a patent plan we can view and download.

When you first go to the page, you will get a pop-up with a link to the Ontario Archives Patent Plans Collection that we've been looking at. Either press the faint "OK" button or press Escape on your keyboard to close that pop-up. We can now zoom in on the map to better see the individual dots with titles beside them. Clicking on a dot or title will display another pop-up where you can then download the patent plan being referenced.

 

For those who use the very useful Heritage Property INdex site to find early freely available maps for Ontario, when the Archives of Ontario moved to AIMS and broke the links to the high resolution maps, the links on Heritage PIN in the Pre-Confederation Patent Maps pages were also messed up. But the image names were still kept on the screen.

How does that help us?

Instead of searching for a township or plan name on the "Ontario Archives Patent Plans Collection" site, we can search for that file name in the search box. For example, for Drummond Township there are three maps linked to: I0043121, I0043403, and I0050655. We can search for I0050655 and the patent plan "Drummond Township (Perth Townsite)" appears. Now we can download the map for our viewing pleasure³.

In my opinion, for those with early settlers in Ontario, these patent plans should be one of your go-to resources. 

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1. That's a post for another day since I'm still trying to figure out the good, the bad, and the ugly in terms of our genealogy research endeavours with the new Archives of Ontario site. I'm waiting a week for some of the initial quirks to be hopefully ironed out.

2. Yes, the AIMS back-end still has some serious issues where it just spins its wheels and seems to crash, at least from an end-user perspective. That actually happened as I was writing this post.

3. I have let the owner of the Heritage Property INdex site know of this new development in the ongoing saga of the RG 1-100 Patent Plans.