- CAD Drawing
- CAD Drawing Import
- CSV Survey Points Import
- LAS Format for Survey Points Import
- Google Earth Import
- How to import more than one (1) survey point groups
- Survey Points Properties
- All in One Import Function
Survey points in MiTS 2 can be imported in CAD drawing, CSV format file, LAS file and Google Earth.
CAD Drawing #
MiTS-Earthworks can directly generate an existing ground digital terrain model from the surveyor CAD drawing imported. The surveyor CAD drawing can in ANY of the following form:
Contour Lines #
Contour lines that are having incorrect Z value or elevation are not usable.
Text Spot Levels #
Spot Levels with Single Text
Spot Levels with Two Separated Texts
A spot level with two separated texts which fulfil the following criteria will be accepted during survey point import:
The two separated texts of a spot level have the same Y-coordinate.
Distance between two separated texts of a spot level is less than or equal to the value specified in setting.
The texts ‘724’ and ‘52’ have the same Y-coordinate . The distance between two separated is 6563mm which is less than 10,000mm, therefore application will regard ‘724’ and ‘52’ as a single spot level.
Touch Up Before Separated Sport Level Import:
Open the drawing in the CAD application, delete overlapping texts. If AutoCAD is used, command OVERKILL can be used to automatically delete overlapping objects.
Make sure the user coordinate system (UCS) is as below; not rotated:
3. Text alignment is horizontal.
Points that have incorrect ‘Position Z’ values are not usable.
CAD Drawing Import #
Prior Requirements for Import #
Drawing in Full Scale
The surveyor CAD now can be imported in any scale (mm, m, inch and etc) in order to generate a Digital Terrain Model with a set of true topography data. The import of scaled drawing will lead to generation of mini Digital Terrain Model.
Layers for Import
Users must have prior knowledge of which layers in the drawing are needed to be imported.
Select ONLY the layers needed for the surveyor drawing import:
Contour Lines Stored Correct Z Value (Height)
For the drawing with contour lines import, the contour lines must carry correct Z values. Users are advised to have prior checking on the contour lines in CAD program by right-click on the lines and select ‘Properties’ then view the ‘Elevation’ or ‘Z value’ value of the lines.
For the import of drawing with Texts, check the text and make sure the value in the ‘Contents’ is an acceptable numeric or alphanumeric text. (Refer to below)
The command ‘FIND’ in the CAD program can be used to replace all the alphabet or symbols to an acceptable format.
There are five unit conversions for Texts; the Texts can be either in millimeter, meter, kilometer, inch or feet in the drawing. Application will only accept and import IL, INV, and SIL alphanumeric texts, the rest will be discarded.
Accepted alphanumeric texts:
Steps to Import Survey Data #
Survey Points can be imported in the Main page, or in ‘Earthworks’ or ‘Road’. Click Import Manage to import survey points and click ACAD if survey points are imported from the CAD Drawing.
Select and open the CAD drawing
Name the survey points group at ‘Point Group Name’ , select/tick the layers
which are ONLY relevant to survey data and click ‘Save’ & ‘OK’ .
a. Saved survey points group can be deleted by clicking the ‘Delete’ .
b. Survey point groups with different colours can be created via changing the colour box located at the right of ‘Point Group Name’ before clicking ‘Save’
c. If there are spot levels with separated two texts being imported into application, kindly ensure the checkbox of the ‘Import survey point with two separated texts’ is ticked.
Advanced Setting #
To active the advance settings, click the Advanced Settings button at the bottom RHS
Then, the advanced settings tab will be shown
- Elevation Range
- To allow the user to select the survey point range users want to to import.
- Survey Point Text
- ‘Survey point with two separate texts’ can refer to 1.2
- ‘Elevation follows text’ is applicable if there is only one text
- Elevation Interval
- Polyline Import is applicable if there is a contour line import. User may refer to here for your further reference
- Survey Point Type can be used to only select a specific type of survey point
Platforms Import (if any)
Choose the respective layers ONLY for platforms imported in the ‘Platform’ tab & click OK.
There have same criteria need to meet before import platforms into application:
a. The platforms drawn in the CAD program must be CLOSED POLYGON.
b. There must have Proposed Level Text inside the polygon in order to generate the correct proposed level after imported.
CSV Survey Points Import #
CSV (comma-separated values) format for survey points can also be imported in MiTS. Example of CSV file as below.
To import the file type, click on “Import Manage > Click ACAD/Text/LiDAR > Choose the file”
Then, choose to assign the unit accordingly and click on Import.
LAS Format for Survey Points Import #
LAS format is a file format designed for the interchange and archiving of Lidar point cloud data.
To import LAS file, click on “Import Manage > Click ACAD/Text/LiDAR > Choose the file”
Google Earth Import #
In MiTS 2 now, users are able to use google earth import from Google.
Go to Earthwork >> Survey Points >> Manage Groups >> Gearth Import
The Gearth Import tab will look like image below:
- Insert the API Key;
- API Key is used to track API requests associated with user project for usage and billing. User may refer to “How to Get API Key for Google Earth Import” blog post for further reference.
- Go To;
- Users can insert the latitude and longitude of their respective project development and Gearth will bring the user to the latitude and longitude inserted.
- Users will also be able to import the OGL directly from Gearth or use the OGL import from Gearth as comparison with the existing Surveyor Drawing.
- Click at the first point of the survey area, then ‘Origin Coordinate’ windows will popup;
- Origin coordinate is the imported survey points coordinate imported in MiTS software.
- Specify the EW Coordinate Axis Direction;
- Follow GPS Orientation – Will follow perpendicular from the first drawn line
- Set EW Axis Direction – To produce a tilt axis
- Set EW Axis Point – To produce a tilt axis by using a coordinate BUT user needs to make sure the coordinate will produce the 90-degree axis
- User may edit the name of imported google earth survey and change the grid size before importing the survey points
For parameter setting, go to Options >> Project Parameters >> Import >> Google Earth Elevation Import
For further reference, user can refer to the linked video below for visual guidance.
|Max. Location in a request||Maximum number of locations requested in a single web request, Google says you can specify 512 but it’s best to set it to a smaller number, say 300.|
|Max. Request per second||Maximum request in a second. Set a reasonable number for this to protect your service from being throttled by Google in the name of abuse prevention.|
|Extra delays after a batch of requests||The program will introduce an extra delay (in seconds) after you reach a certain number of requests. This is to protect your service from being throttled by Google in the name of abuse. prevention|
|Maximum requests in a single day||Maximum elevation request you can try in a single day. The maximum is 2500 as per google guideline. Set a limit lower than that. Play fair.|
- User may refer to “How accurate is Google Earth Elevation?” to get more information regarding Google Earth.
- If user encounters some error, user can refer to “Troubleshooting Guideline for Google Earth Import” blog post.
How to import more than one (1) survey point groups #
To import more survey point groups
*Kindly note to differently name the survey point groups to avoid software confusion
*Let say if the new survey points name is the same as the previous survey point group name, then the user will need to choose whether to ‘overwrite current survey points’ or ‘add to current survey points’.
After importing a new survey point group, users may proceed to calculate earthwork cut and fill volume.
Go to Earthwork >> Click ‘Calculate Cut/Fill’
Select the survey point group at the comparison tab and click calculate.
Survey Points Properties #
“Survey Points > Edit > Properties MISC tab”
Display one survey point group #
Click on the Point Group and select one of the survey points groups
“Survey Points > Edit > Properties MISC tab > Point Group”
Display All survey point groups #
“Survey Points > Edit > Properties MISC tab > Show All > Choose Yes”
To turn survey points layer on/off.
Point Size #
To change the survey points point size.
Text Display Setting #
Users are now able to show the survey point value.
Go to RHS property grid > click properties tab > 3.Text Display Setting > Show Value > set to YES
All in One Import Function #
All in One import function is now available.
This is to allow users to import all modules in one go.
For example, to import survey points, earthwork platforms and drainage networks in one click.
Go to Import > select drawing > at ‘All in One Import’ tab, users may switch tabs to select which module to import