https://www.youtube.com/watch?v=27nOOp4A7IQ

hi my name is Luke and I'm from draff technology today I want to take you through and showcase one of the great examples of using draff and that's scenario analysis scenario analysis leverages analytics within the draff application as draff application is not just a spatial application it's not just a drawing application but also an analytics platform and we can combine all those elements the drawings of our Urban Design Within the spatial context and then build analytics on top so scenario analysis is comparing one scenario against another and in this example I'm going to look at scenario a scenario a being the the existing conditions and scenario B being uh a proposed change in Zoning for this activity center and this is the residential area outside of an activity center and we've got low density residential uh which ab buts up to uh great sporting facilities a transport Precinct and um existing um medium tie density residential uh and I've actually got the

analytics Page open up on the right and we can see some of the analytics which we are going to look at today we're going to look at the um the gross floor areas of our land usages uh we're going to look at some of the housing stats by upzoning uh we're going to look at some services is required to service those uh those um the houses and um the growth in demand as well as looking at um the impacts on a landscape such as canopy and um maybe even some um the the cost involved of servicing those um those

trees okay so um firstly let's just have a look at uh managing all of the data inside of inside of

giraff in order to facilitate scenario analysis what I like to do is set up some drawing layers and um group them up together for the scenario so let's have a look in the in our layer panel I've got a group of layers called existing conditions in that I've got our dwelling um data set which includes some of the buildings which we've extracted out of our um our default 3D buildings layer uh We've loaded some um vegetation which we've been able to digitize from the um the Aral imagery uh and we've also um modeled up the land usages so land usages and buildings are a um special type of feature inside of giraffe they're not just polygons they're actually smart features so if I click on this uh this land usage we can see that we've Define that as a particular land usage type uh and we can actually dive deep into this usage by clicking on our usage menu which talks about all of the different standard properties for that particular usage and within draft we can

define a whole range of different land usages or building usages um and even um even different open space usages and typologies and when you create that that um typology or usage you can Define standard Global um properties for those usages which you apply across any feature which uses that usage so in this case for our low density residential we're defining that that has an overall height limit of 8.5 M uh we're saying that there's an average dwelling size of 200 square met uh and and we've even put a proper in here to say that this particular usage has a ratio to Res residential to retail of just one uh whereas some of our mixed use will have a different ratio of say 0.4 0.5 depending on the particular Zone where we are um or usage which we are looking at so in this case we have defined low density residential for this usage this is our existing conditions and we can we can confirm that by having a look at our spatial data giraff is a spatial application and

we can start to bring in lots of Rich information for our neighboring context and even for our entire city in this case we're using we're in Victoria and we're using the planning scheme and that's what you can see is the salmon and pink colors in the background in the green uh this allows us to quickly understand um the current controls it's really great for understanding like what the existing conditions are uh there not just a graphical layer I can right click on this area and you can see at that location we've got a whole range of different data sets and in this case um I can if I hover over on the left hand side we can see that this it's picked up our road area um so that's our transport Zone and then if I click on this one it's showing that's a neighborhood residential Zone um and that's then I've been able to draft on top of that uh our low density residential which uh is one for one with the neighborhood residential Zone in

Victoria okay well let's have a look at um rezoning this area let me turn off my existing conditions group we'll turn on our rezone layer you can see that uh the land us land usage colors have changed from the light pink through to more of a salmon color and the purple uh if I have a look at that feature this one says high density and mixed use and if I have a look at the usage for that um this is a mixed use zone so I can see that and being high density we have increased the height allowance up to 27 M uh and it's got a ratio of residential to retail of 0.9 uh our dwelling size we well we're not really looking at um single dwelling house anymore it's likely going to be apartment sizes so that's 70 M uh we're looking at um for all of the uh particular residential area we're saying that there's um um 20 20 jobs per um per retail dwelling and um yeah so we've been able to Define like what all those statistics are for for that particular uh land usage

so where this is important is when we want to start to do analysis on the um on that Urban Design um if we start to have a look at our analytics tab uh we can I've initially started to do uh scenario analysis measures against the Align usages and first one is the G gross floor area you can our um our measures themselves can either look at the properties within the features um in the the layers uh or they can look at particular measures which are already in your analytics panel uh and in this case we're looking at different properties for the forther the features we've got an A and A B uh and what we're doing a relates to the the square meters of all of the features and the B relates to the force Bas ratio property Associated to those land usages and what we're doing is saying a * B uh to times the area by the for bace ratio and that gives us a total uh gross FL area of our existing conditions and then our reson conditions and in this example I've then broken it down further

to say well what's the um division of residential versus retail and you can see that uh in our existing conditions we had zero retail and um as our proposed res Zone scenario a uh uh ween B uh we have now um got uh about 3 and a half thousand square meters of gross Flor [Music]

area um now traditionally with our analytics you would just get one column of results however there is a particular mode which allows you to do the scenario analysis you'll see up here in the top right hand corner I've got it set to layer group and what this does is it will um once I've selected layer group from the list here it will create a list of results which is filtered to our particular layer groups and that is really the trick to scenario analysis within draft analytics uh so I've got my group exist conditions reone conditions and normally you may have some other layers as well and what you can do is you can come into the Cog here and to the settings and then you can use your hide groups or hide layers to explicitly remove content from your from your results and once I've done that I've got nice two clean columns existing conditions and reone scenario now if you wanted to have like a scenario c a great way to do that would be to create um uh duplicate your

land use and your building layers and put them into a new group called you know rezone scenario 2 Etc and you can start to build out additional scenarios and analyze the performance of each Urban

Design so as part of the design we haven't just looked at at land usages we've also looked at the individual buildings so let's just have a look at that on map I'll just turn this off for a second so in our existing conditions we have the individual building elements uh and then within our rezone scenario we've been able to model up some of the buildings as well and in draft it's really easy to draw buildings um uh we can just come up into our uh drawing tools at the top of the page uh we can come down here and then just pick out residential uh and then let's uh let's say that these two lots here are going to get Consolidated and we're going to put a f story building on that lot and actually you know it might have a Podium at the bottom and then having a building on top of that uh and then we can quickly just come and um redesign that that apartment block so let's look at it like a back um after the first two levels uh and um yeah so it could could be even more

more detailed than that if we really want to uh not that this is like a session about drawing but um it might have like a particular articulation just just in terms of meeting the um the Shadow and and light access for those for those residents but I digress so what we've done there there is we've started to add more residential buildings to our uh reone scenario and you may not have been paying attention to this uh but as we started to build out those additional dwellings uh you'll see the stats on the right hand side will start to update uh and this is a great example of how um the data inside a DFT is um is very malleable so say if you're using this uh within a public consultation you can be sitting down with your um with your stakeholders whether they're residents or the local you know business groups and really look at the impact of like what it is to start to develop your area and um you know even in like in a live situation you can start to modify

and then look at what is the impact on um dwellings and jobs Etc but that being said let's have a look at how we actually calculate those those stats so firstly number of dwellings so here we have a property which comes inherent with our residential um building usage which is the total dwelling count so here we've just said we just want to um create like a summary field of all of the dwellings for all of the buildings so it's just dwelling count and we sum that together next we've been able to instead of um calculating the gross flow are area from our land usage which really looks at like what's the maximum uh it's uh essentially the um like the site coverage plus like the entire area of the block uh here we've been able to do that for our entire buildings so uh once again our residential usage has a gross floor um property um so we can just sum that up and we can get at that figure for just all of the actual design so it's like an extra level of detail down from the ones above

next we can calculate population uh so uh let's say we have a number of dwellings in this case we're not using a property we're using the measure from one we've already calculated so we don't need to go and uh count all of our dwellings again um what we can do is we can just call the our uh measure from the table uh and then we can provide like an assumption to say that each of those apartments or dwellings will uh have around 2.1 people Associated to them and if we really wanted to we could start to get like more complex as part of this we could say that um you know all of the uh the dwellings which are meet a um you know single dwelling house may have a particular uh assumption around the population or the apartments under a particular size may have a particular assumption so in this one we've gone quite simple and we've just said that our um uh a which is the number of dwellings and we'll just Times by

2.1 uh I've also looked at a um a way of starting to calculate what the rates um would be for for a council for that area so I mocked up what the land PR price might be uh and then looked at what the capital improve value would be and that's just an example and I'm happy to um to if anyone's interested in just reach out and I'll show you how you can do that once we've got our dwellings we can look at things like um you know our electricity usage and water usages and um and even say if the you're working for a particular um Council and they provide libraries we can start to say well what's the requirements in terms of those Public Services uh so in this case we've said that um uh for electricity like how much how many watts does a a particular dwelling require so we're looking at or a person require so uh we've got our measure we calculated before our population we just times that by 50 uh to result in the amount of wattage uh and you can see by using our

different scenarios that we've gone up from about 45,000 Watts uh through to 28,000 watts and that may be something which you may want to consider as part of up zoning like whether you have the electrical infrastructure to support the um the up Zone same for our water requirements uh and in this case uh for our books we've said that every person or a population requires 10 books per person I think I personally probably require more than that but uh that that would be like a average which you would get maybe based off talking to the um you know your uh community service planners to um to provide some assumptions that you could plug into your model uh finally let's have a look at our open space features so you know in our in our uh existing conditions we had plotted up the trees um which were on the sites uh and after you know maybe some of those would have to be um bulldozed and um but you know we could retain some of them but we would want to include some

landscape as part of the of the design as well so we you some of giraffe's uh great tools on um building out landscape areas um this is like a park with trees which uh not only plots the um the um the parcel Dimensions but also starts the populated trees and we've got different densities um and different types and all of these features would start to contribute towards the stats Within in your uh model uh and here we can start to see we've got a particular canopy cover and as part of your reason you might be going for a particular um particular Target in terms of canopy cover um you might look at what the actual costs are to uh to plant those trees and you could even look do things such as like any of the trees you need to bulldoze might have a particular offset cost for example as well uh thanks a lot um if you'd like to know more about some of the things which have looked at as part of this course we have a draff Academy on YouTube um which if you look up draft technology you'll uh

see that we have a whole bunch of video content um including starting from scratch learning about our tool and learning about usages properties drawing and I would highly recommend people go through and um follow those fantastic courses we also have a great knowledge base where you can also go and self- serve information about using giraffe uh if also feel free to contact me on LinkedIn uh and um check out our website and I encourage everyone to just get in there and start um trying and leveraging our great platform thanks a lot