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HUVIAiR The Ultimate Guide for Land Surveying with Drones (How to use Pix4D Cloud)


So let’s start with Pix4D cloud. This is one of the avatars of Pix4D which you can use for processing your images and visualize the outputs. The website is ‘cloud.pix4d.com’ If you don’t already have an account, do sign up. Fill out all your details. You get a 15 day trial with them which is great! You can immediately get going. You can check out all the features of both pix4d cloud and desktop applications during this time and then opt for the paid subscription later on. For the purpose of this tutorial, I have already created an account and I am going to login now. So I am, logged into my account. Pix4D has four products. Pix4d mapper which is for surveying, mining, mapping and forensics. Pix4Dbim for construction, earthworks, building information modeling and inspection. Pix4d agriculture and pix4dmodel for real estate. The difference between pix4d mapper and bim is the interface, so let’s look at examples to illustrate this. So, click on pix4d mapper and go into the quarry example. This is the interface of pix4dmapper. This is used for one time projects. This could be for a survey requirement when your customer has just bought the property and wants to do a topography survey or for an urban town or city which needs mapping to be done to map out its properties and assets. Here is a download option. You can export the project to pix4d desktop and then work with it there. Or you can download the individual outputs like quality report, the obj file, which is the source file of the 3D model, the point cloud, the orthomosaic, the DSM and the processing log. You can use this interface for distance measurement… and area measurement. You can toggle the elevations map …..and the satellite image as well. With the DSM you can adjust the opacity from 0 to 1. 0 makes it completely invisible and 1 makes it fully visible. The same can be done for the orthomosaic. You can adjust the histogram of the DSM and show only a certain range of elevations. So that’s the pix4d mapper. Now, let’s look at pix4d bim. We’ll open the example project that they’ve provided. Here the interface they provide is maps of the same project along a timeline. So right now, it shows me the data on 27th march and how looks like. This is a great way to map out the progress of the project across the timeline. So if you’re doing the mapping of a construction project, you can give your customer a periodic update on the progress of the construction using this interface. Now let’s look at 4th October. Here’s what the orthomosaic looks like. You can zoom in. You can draw a polyline and get the measurement. A polygon for area measurement. If you click on the polygon you get the area details. The same way if you click on the polyline, you will get the distance details. ..You can put a placemark and add notes. So here again, you can export all the outputs like in pix4dmapper. Here’s the 3D model view, which was also there in the pix4d mapper application. So let’s load the 3D model.. You can zoom in, zoom out, orbit and so on. They also have pix4dag, for agricultural purposes, but we’re not covering that in this course. It needs special treatment and we’ll bring that to you very soon… And then they have pix4dmodel. Now, pix4d model just renders the 3d model for you. It doesn’t generate any other outputs or analytics. So this is a 3D model example that they have. now, let’s upload a new data set into pix4dmapper. So, click on upload new project. … Let’s call it test. So choose all the files… Click open… And it starts uploading. It shows you the progress here on this progress bar. Once the upload is done, click on start processing. The amount of time it takes really depends on the number of images you have uploaded. We’ve already uploaded and processed a project for this tutorial. So let’s get into that. So this is an aerial survey project that I conducted for a site which is in pre development stage. So, let’s try an area measurement. I am going to measure the area of this property. And there you go it displays the area… And now let’s measure the length of this fence, for example. It displays the length of this fence…..Now let’s look at the DSM. You can reduce the opacity of the orthomosaic to look at the DSM completely. You can adjust the elevation histogram to look at specific elevation subsets of the areas of interest. So, here are the download options that they provide. You can download these and then do the needed post processing which we will talk about in part 2 of this course. And thats about it for pix4d cloud…Next I am going to take you through pix4d Desktop.

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