1 open source geo-spatial tools and mobile device for ... · project : canal network digitization...

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Open Source Geo-Spatial Tools and Mobile

Device for Canal Network Digitization

Paavan Kumar Reddy Gollapalli

Young Professional, ICID(WG-SDTA)

Agricultural Engineer, AMIE

PGD in RS & GIS (ISRO)

Introduction

Now a days capturing of coordinates is possible with all devices which are

connected to satellites

Purchasing of GPS device especially for single work is not viable at all times

because of economic constraints

With the use of mobile devices canal network digitization is possible and

also the wealth condition of the structures and encroachments

identification is done through location where it is happened.

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Overview of Presentation3

▪ Case Study 1: Guntur Channel Medium Irrigation Project Canal Network

Digitization using Mobile Device and GPS: Water Use Efficiency Studies

Experiences (WALAMTARI, Hyderabad)

▪ Case Study 2: Bhupathipalem Medium Irrigation Project : Canal Network

Digitization Studies Using UN-ASIGN application (Water Resource Dept., Andhra

Pradesh)

▪ Accuracy of the work

▪ Adaptability at Field Level

▪ Conclusions

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Case Study 1: Guntur Channel Medium Irrigation

Project Canal Network Digitization using Mobile

Device and GPS: Water Use Efficiency Studies

Experiences (WALAMTARI, Hyderabad)

Authors

G. Paavan Kumar Reddy, paavankrg@gmail.com

Anita Yadav, DEE, WALAMTARI, Hyderabad, shetty.anitayadav@gmail.com

K. Yella Reddy, Vice President (ICID), Ex Director (A&R), WALAMTARI, Hyderabad, yellark@gmail.com

L Narayan Reddy, NIT, Warangal & Ex Director General, WALAMTARI, Hyderabad, aproop93@gmail.com

Data used and MethodologyGPS device Mobile device

Garmin etrix 30 (4 No’s)

Lenovo K6

Samsung Tab (2 No’s)

Moto G4

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Ground truth data collection

Data Processing

using QGIS

(photo2kmz)

Canal Network Digitization

(Add Path)

Canal Network

Mapping of Canal

Network using QGIS

Collection of Ground Truth Data

Photo Credit : WALAMTARI, Hyderabad

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KMZ file opened in Google Earth

Digitized canal using the photos co-

ordinates on Google Earth

Photograph properties showing

Latitude & Longitude taken in

mobile

Length of Canals Surveyed

Content Length/Number

Total number of canals (Main canal, Distributaries, Minors,

Sub-minors and Filed Channels)52 No.

Total length of the canals 250 Km

Length of canals surveyed by GPS device 130Km

Length of canals surveyed by mobile device 120 Km

No. of Structures captured as photographs 373

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Waypoints of GPS device (Blue colour) and KMZ file points of Mobile device (Yellow colour)

shown on Google Earth

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Canal network of the Guntur Channel digitized on Google Earth using GPS &

Mobile devices data

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Case Study 2: Bhupathipalem Medium Irrigation

Project : Canal Network Digitization Studies Using

UN-ASIGN (Water Resource Dept., Andhra Pradesh)

Authors

G. Paavan Kumar Reddy, Trainee, paavankrg@gmail.com

Gopala Krishna, Assistant Executive Engineer, Musurumilli Division, Water Resource Department, A.P

Subramanyeshwara Rao, Executive Engineer, Musurumilli Division, Water Resource Department, A.P

Other Assistant Executive Engineer, Musurumilli Division, Water Resource Department, A.P

Data used and Methodology13

Ground truth data collection

(Mobile App)

Data Storing in

UN-ASIGN website

Canal Network

Digitization

(Add Path)

Canal Network

Data Processing

(photo2kmz)

Mapping of Canal

Network using QGIS

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UN-ASIGN working

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Plate showing the full view of Structures captured in Bhupathipalem in

UN-ASIGN website

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Plate showing the view of one structure in Bhupathipalem

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Plate showing the editing view of attribute data of structure

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Plate showing the co-ordinates on the photographof structure

Length of Canals Surveyed

Content Length/Number

Total number of canals (Main canal, Distributaries, Minors,

Sub-minors)24 No.

Total length of the canals 180 Km

No. of Structures captured as photographs and stored in

UN-ASIGN crowd source

813 No.

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Accuracy of the work

Purpose of work has to be clarified

Mobile device is also giving nearer accuracy of GPS

device

The best example for this one is UN-SIGN mobile

application

Digitization of canals (Depends on person to person)

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Mobile device showing accuracy of 4 m

Courtesy: UN-ASIGN

Adaptability at Field Level

The average distance covered by each person /day is 8 – 9 km

Nowadays all the field level staff (Luskars/Work Inspectors) have smart phones and are well versed with its operation

Field staff are very well acquainted about their irrigation schemes

All the Officers of irrigation department are now equipped with minimum one

computer

Engineers (Assistant/Assistant Executive Engineers) have to

to improve their skills/knowledge on QGIS and Google Earth

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Conclusions

Advantages

No Investment is required from the time of collection of data till processing

of data

Processing of data can be done in open source GIS softwares (QGIS) and they are user friendly also

Ground truth data (photographs) can tell

the current situation of the canals

Efficient use of man power at field level and we will get precise work

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Conclusions

Limitations

Mobile takes time to get connected with location services for getting the co-ordinates for

photograph

Sometimes accuracy goes beyond 20m to some thousand meters at initial stage

Battery in the mobile device gets dead early because of continuous usage

Sometimes co-ordinates for the photographs are not created because of poor satellite

connection or obstructions like trees/forest

Attribute data collection

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Acknowledgments

For Case Study 1: The authors acknowledge the financial support received from the

National Water Mission, Govt. of India and the Water and Land Management Training

and Research Institute (WALMATARI), Hyderabad, Govt. of Telangana, India for giving

support to conduct survey at Guntur Channel Medium Irrigation Project.

For Case Study 2 : Executive Engineer, Bhupathipalem Medium Irrigation Project, Water

Resources Department, Govt. Of Andhra Pradesh for conducting the survey.

UN-Asign crowd-source photos mobile app

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Key References

N Bhaskar Rao, Guest Lecture Notes, WALAMTARI, Hyderabad.

Google Earth User Guide,

http://static.googleusercontent.com/media/earth.google.com/en//usergu

ide/v4/google_earth_user_guide.pdf

Guntur Channel Medium Irrigation Project Sub-Division, Water Resources

Department, Govt. of Andhra Pradesh, India.

Quantum Geographical Information System (QGIS) Version 2.18 User Guide,

http://docs.qgis.org/2.8/pdf/en/QGIS-2.8-UserGuide-en.pdf.

https://www.unitar.org/unosat/un-asign-crowd-source-photos-mobile-app

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Thank You

Reach me at

paavankrg@gmail.com

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