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Monday, 23 October 2017

Recreating History: Pretoria 1947

"Photogrammetry is the science of making measurements from photographs, especially for recovering the exact positions of surface points. Photogrammetry is as old as modern photography, dating to the mid-19th century and in the simplest example, the distance between two points that lie on a plane parallel to the photographic image plane, can be determined by measuring their distance on the image, if the scale (s) of the image is known." - Wikipedia

Have you ever wondered how your hometown looked 50+ years ago? Well, if you have access to Recap Photo and some old aerial photos you will very likely be able to recreate your own piece of history. I sourced some old aerial photos of Pretoria, South Africa from the Institutional Repository of the University of Pretoria and by using Recap Photo, achieved some amazing results!

The images below are of individual aerial photos taken in 1947. I was amazed by how rural some areas were - Areas where today there are major residential, commercial and industrial sites.  

Within Recap Photo, one can create a new 3D project using either the Aerial or Object functionality. Aerial is used for UAV and drone photos (Where one could have GPS data assigned to the photos) and Object is used for applications other than drones or UAV's.

The process of photo to mesh conversion takes place in 3 stages: Uploading the photos, registering the photos for mesh creation and lastly downloading the 3d model as a .rcm file.  

The end result? If there is enough overlap between the aerial photos you will be able to generate a 3D model with minimal user input. Are you excited? I definitely am!

Tuesday, 3 October 2017

Toposurface From Infraworks Model - Success!

In the beginning of 2015, I created a post where Infraworks' Model Builder capability was outlined. Since then, we have done numerous tests to see how far the software will get us - 2 Years later, I posted that in Revit 2018 one can link a Coordination Model (Navisworks file) which may be used for site planning. At that time, I could however not find a way of generating a toposurface from the Coordination model.

Enter my colleague Mitchell Parsonage, who managed to create a workflow with three easy steps :

1. Define your site extent in Infraworks and export to an OBJ format

2. Import the OBJ into Autodesk Formit, and Export to DXF

3. Link the DXF into Revit and generate a Toposurface from the Import

4. The end result? Nicely done Mitch!

Friday, 15 September 2017

Revit Detail Item Source Files

Based upon the success of the post: Revit Planting RPC Source Files, I thought it would be a good idea to create a Detail Item Source File which Revit Recess readers can download. So I started working on a source project, laying out the different detail item family divisions, intending to group and sort each detail item family accordingly.

I soon realized that doing something like this in my off-time would take quite some time. I have however found a Eureka moment while rummaging through the default content library.

If you have installed the UK content, have a look at the Detail Items folder. You will notice a DWF file called "DetailComponents-Browsable-PlotableSheets" in which all of my planned work was already done.

This DWF will contain previews of all the UK content Detail Item families, already grouped and sorted into their different Divisions.

By the way, did you know that there is an updated Autodesk Design Review you can download for free? No more working in Design Review 2013.

Have a great weekend, folks!

Thursday, 14 September 2017

3 Categories for one element?

I recently experienced some very strange behavior on a client model. Three "categories" for one element. You might be thinking: Impossible!

One does however stumble across some strange things in Revit, with some of my favorites highlighted in Luke Johnson's blog: What Revit Wants

Getting back to the "three category element" though - While doing a bit of family maintenance on a project, I came across these diagonal lines: Looks like Reference Planes, right?

Not really.... Revit sees it as Linear Dimensions....

When navigating to a referring view, however, they are seen as camera views... Has any reader experienced this yet, and even better: Found the reason?

Tuesday, 5 September 2017

AU South Africa - The Countdown Begins!

As a lot of Revit Recess's South African readers will already know, Autodesk University South Africa takes place on 8 September 2017 at the Century City Conference Centre, Cape Town. Only 3 days to go, everyone!

This year's event is sure to be bigger and better than last year (Which already exceeded our expectations).

Should you require more information on the event, feel free to follow the links below:
* Pricing
* Agenda & Track Descriptions
* Speakers
* CPD Points
* Design Competition
* Venue & Accommodation
* Sponsors
* Gallery

As mentioned in previous posts, we have a lot of exciting things in store for all attendees, making this event well worth your valuable time. An example of one of these is the Modena selfie frame. Feel free to take some photos and have Autodesk University South Africa trending on your social media platforms: #ModenaInAction #AUSouthAfrica