TABLE OF CONTENTS


Chapter 1 

Logging In

To log in, you need the URL and your user credentials.

 The login page opens.

  • Enter your username and password.
  • Click Log In.

The application opens and displays the Home page.


Introduction To SenseHawk Terra

Terra is an easy-to-use map-based interface developed to help industry professionals transform real work scenarios into digital assets by capturing, analyzing, and visualizing their project environment. It is a GIS, design automation, and data management platform enabling developers to manage multiple development projects and sites with preliminary site evaluation and design topography options.


Key Concepts & Methodology

Terra helps in reducing the complexity of the terrain analysis. Below are the steps followed.


Photogrammetry

SenseHawk uses a method known as photogrammetry to generate 3D surfaces and terrain maps. Photogrammetry, as a science, is more than a century old - the basic technique involves the collection of aerial photographs that overlap with each other. Overlapping photographs are analyzed for standard features in the area of overlap. Suppose the exact location and orientation of the camera are known at the time of capture of each image. In that case, the XYZ locations of these common points can be precisely determined to construct a 3D point cloud, using which a 3D surface and a color orthomosaic map are generated. Below is a high-level overview of the photogrammetry process.


FIG 1: OVERVIEW OF PHOTOGRAMMETRY PROCESS


With the help of RTK (Real-time kinematic) equipped drones and adequate ground control, 3D surfaces generated by this method will have absolute accuracies of up to +/- 1 cm (0.4 inches). In most cases, the accuracy levels exceed those obtained from more traditional methods like LiDAR1.


Additionally - our proprietary terrain filtering process removes extraneous objects such as vegetation, buildings, farm machinery, and so on from the surface model, giving an accurate picture of the bare-earth terrain.


FIG 2: OUR PROPRIETARY TERRAIN FILTERING ALGORITHM REMOVES EXTRANEOUS OBJECTS

SUCH AS TREES FROM THE SURFACE MODEL, GIVING YOU A TRUE PICTURE OF THE TERRAIN.

Chapter 2


SenseHawk Terra User Guide

1. Log in to app.sensehawk.com using your credentials

2. On the organization Home page, click on the desired asset

FIGURE 2: PORTFOLIO OF ASSETS

Topography

Measuring Elevation Profile

Delivering an understanding of elevation and landforms, an elevation profile in the description of a two-dimensional cross-sectional landscape view. It provides a side view of a terrain elevation along a line drawn between locations on the map.


1. Click on the line string tool from the toolbox on the right side of the map. Draw a line across any part of the map for which you would like to check the cross-section elevation.


2. Click on the line drawn and select 'Elevation Profile' from the toolbox.


3. In the elevation profile dialog box, set the parameters. Choose the method as 'Line' and interval as '1m' or lower. Set the layer as 'DSM' and click on 'Calculate Elevation'


Measuring Spot Elevation

Elevation of a point on a map or chat called spot elevations is used principally to indicate points higher than their surroundings. A spot elevation displays the actual elevation of a selected point and the top and/or bottom elevation of elements with a thickness.


1. Like measuring the elevation profile, select the marker tool from the toolbox and point anywhere on the map to check the spot elevation.


2. Click on the point and select 'Elevation Profile' from the toolbox. Select the method parameter as 'Point' and layer as 'DSM' in the dialog box.


3. Click on 'Calculate Elevation' to get the spot election results.


Volume Calculations

The volume calculations give accurate results for the volume of an area. The area of cutting and filling is found out for each section with the Polygon method or Net area calculation method. The volume is determined by multiplying the average area with the distance between sections.


1. Like measuring the elevation profile and spot elevation, select the polygon tool from the toolbox and draw an area anywhere on the map to calculate the volume.


2. Click on the area and select 'Elevation Profile' from the toolbox. Select the method parameter as 'Base Height' and layer as 'DSM' in the dialog box.


3. Click on 'Calculate Volume'.

Construction Monitoring Overview

Your assets generate considerable data across the lifecycle - SCADA data, terrain maps, design documents, contracts, site activity-related data, and much more. SenseHawk enables seamless construction monitoring of your asset through a digital sitemap that allows capturing, organizing, and storing this data to facilitate quick retrieval and advanced analytics.


Dashboard

Click on your desired asset on the organization's 'Home' page. As it opens the dashboard view, click on the Terra name to go to the map or the terrain view.

FIGURE 3: DASHBOARD VIEW


FIGURE 4: MAP/TERRAIN VIEW


Scan Dates

As it opens the map/terrain view of the site., select the desired scan date.

Filters

a) App Filters

Click on the gear icon in the tools menu for App filters

    - Check or uncheck Tasks/Forms on the map view


b) Feature Filters

Click on the Feature Filter button in the tools menu to filter by feature types on the map.


The filtered view on the map is generated.


Feature Types

The feature types on the map are color-coded and listed in the feature type section. The feature types on the maps can be filtered by selecting/deselecting.


Compare

If there are multiple scan dates, the compare feature will help understand the progress. Comparision can be done between the scan dates and visually understanding the progress by looking at the map's color-coded feature types.


Easily monitor the progress between two scan dates.


Reports

A PDF format can be downloaded by clicking on the download icon next to the scan date. Get a detailed understanding of the construction progress with the report. Hover over the scan date to download the report.


Sample Report: