Report of 6th Esri Summer Camp 2013
1. Contents
Management Summary ................................................................................................................................ 3
Acknowledgements ...................................................................................................................................... 4
2.
3.
4.
Involved Parties .................................................................................................................................... 4
2.1.
Supporting Staff and Teachers ..................................................................................................... 5
2.2.
Supporting Experts ....................................................................................................................... 5
2.3.
Students........................................................................................................................................ 5
Project Description ............................................................................................................................... 6
3.1.
Introduction .................................................................................................................................. 6
3.2.
Field Work .................................................................................................................................... 7
3.3.
Computer Lab ............................................................................................................................... 8
3.4.
Evaluation of the questionnaire ................................................................................................... 9
3.5.
Data quality checks and data editing ........................................................................................... 9
3.6.
Maps ............................................................................................................................................. 9
3.7.
Introduction to Geometric Network .......................................................................................... 11
Group Presentations........................................................................................................................... 12
4.1.
Group A - Field Work .................................................................................................................. 12
4.2.
Group B - Computer Lab ............................................................................................................. 13
4.3.
Group C - Geometric Network.................................................................................................... 15
4.4.
Group D - Live demonstration of a Sand Box Geometric Network for EWSA ............................ 15
5.
Recommendations.............................................................................................................................. 18
6.
Guest of Honour ................................................................................................................................. 19
7.
Appendix I Power Point Presentations ............................................................................................... 20
8.
Appendix II Contact Information ........................................................................................................ 39
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Management Summary
The 6th Esri Summer Camp was conducted in December 2013 in collaboration with the EWSA, JICA and
CGIS-NUR under the umbrella of the Ministry of Education. This year’s theme was called “Improving
Electricity Customer Services with GIS in Kigali”. The main goal of the Esri Summer Camp was to collect
comprehensive information on how EWSA can carry out a Cash Power Meter survey using GPS and
questionnaires to update EWSA’s customer database. The integration of the captured data into an
electricity network created with a Geographic Information System (GIS) showcased how this combined
information can improve electricity customer services. The project Camp should serve as a pilot study to
better understand the needs, to estimate time and efforts for EWSA to capture the Cash Power Meters
within the Kigali City limits.
Equipped with GPS devices from Trimble, ten teams each of two students with one instructor collected
some 700 Cash Power Meter locations and meter numbers in five Imidugudu (Akarambo, Akaruvusha,
Umucyo, Urugarama, Ururembo of Gacuriro Cell) , Kinyinya Sector, District of Gasabo on two
consecutive days.
GPS data transfer, questionnaire entry, data editing, data analysis and mapping was subsequently
carried out using ArcGIS Desktop 10.0 in the Computer Lab of the ET SOS School, Kagugu. The Cash
Power Meter data with enriched information about land lord/tenant names and addresses were added
to the electricity data (Medium and Low Voltage lines, Transformers, etc.) from EWSA.
For the final presentations the pupils were regrouped into four groups. The first group described the
field work, summarized their observations and gave recommendations for an official EWSA survey. The
most important recommendations for EWSA are as follows: Communicate early by informing the
population by Radio, TV, Banners, Flyers, Umudugudu Chiefs, and other local authorities (Sector, Cell).
The second group presented the results of the computer work and showed methods used to ensure
data quality for both geographic and questionnaire data. The third group informed about the
functionality of a Geometric Network in general and the benefits for electricity related tasks. The fourth
group showcased in a live demonstration how an electricity network can be used to find out quickly
potential sources of a problem and to easily locate customers to inform them in case of maintenance.
The goal of the Esri Summer Camp – to conduct a pilot study on capturing electricity facility data and to
show how the electricity customer services can be improved using GIS - was achieved. In addition the
students learned to capture data with a GPS receiver, to collect additional information from households
with a questionnaire and learned the basics about Geometric Networks. A report was compiled with
recommendations for EWSA on how to conduct such a survey in the City of Kigali.
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Acknowledgements
We would very much like to thank the Director General of Energy, Water and Sanitation Authority Mr
Ntare Karitanyi, Mr Phocas Rwalinda, Head of Electrical Planning Unit, Mr Danny Rwagasana in charge of
Electrical standards and technical specifications for his speeches, the Electricity Unit GIS Team for the
good cooperation. Special thanks are expressed to Mr Théophile Mutaganda, GIS specialist of the
Electricity Planning Unit without him the Summer Camp would not have achieved its goal. We
appreciate the good support of Mr Dieudonné Niyomukiza and Mr Jean Pierre Ndayambaje during field
work. We also thank Mr Takahiro Ito from JICA for his support during the planning phase and PR support
from Mr Prosper Mubera and Mrs Angele Umutoni both EWSA.
Without data the best project cannot work properly, therefore we would like to express our gratitude to
the National Institute of Statistics of Rwanda, Mr Florent Birigimana, GIS Specialist, ICT unit/GIS Section
for early supply of Village, Cell, Sector and District boundaries of the study area.
We also thank the Imidugudu Chiefs form Akarambo Mr Bertin Nizeyimana, from Akaruvusha Mr Jean
Rusheke, from Urugarama Mathias Nzamurambaho, from Umucyo Mrs Rose, from Ururembo Mr Patrice
Rwanyagatare for their information management during Umuganda.
Furthermore we like to thank the Director Kiba Muvunyi and the RSAF Freddy Uwisanga of ET SOS
School, Kagugu and their staff for their hospitality and the good facilities.
2. Involved Parties
Ntare Karitanyi
Director General, EWSA
Danny Rwagasana
Head of Design and Standards, EWSA
Phocas Rwalinda
Electricity Unit Team, EWSA
Théophile Mutaganda
Electricity Unit Team GIS, EWSA
Prosper Mubera
Public Relations, EWSA
Angele Umutoni
Public Relations, EWSA
Dr. M. Ch. Gasingirwa
Director General of Science, Technology and Research,
MINEDUC
Florent Birigimana
Takahiro Ito
Michael Sittard
National Institute of Statistics of Rwanda
JICA
CEO, Esri Germany
Kaspar Kundert
Managing Director, Esri Rwanda Ltd.
Kiba Muvunyi
Director, ET SOS School, Kagugu
Freddy Uwisanga
RSAF, ET SOS School, Kagugu
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2.1. Supporting Staff and Teachers
Dorothée Twizeyimana
Gilbert Kubwimana
Isaac Sikubwabo
Elizabeth Mujawamariya
Maurice Mugabowindekwe
Solange Nyirantezimana
Sylion Muramira
Coopec ITI, Rulindo
Groupe Scolaire des Parents, Huye
College St Marie Kibuye
Groupe Scolaire Mutara
CGIS
NUR
Umutara Polytechnic
2.2. Supporting Experts
Théophile Mutaganda
Dieudonné Niyomukiza
Jean Pierre Ndayambaje
Yuka Nakagawa
Jochen Manegold
EWSA
EWSA
EWSA
JICA
Esri Germany
Annick Nsengiyumva
Esri Rwanda Ltd.
Maxime Rwaka
Esri Rwanda Ltd.
Sandra Wairimu Ndungu
Esri Rwanda Ltd.
Theodore Burikoko
Esri Rwanda Ltd.
Connie Schmidt
Esri Rwanda Ltd.
2.3. Students
Name
Mireille Uwase Cyuzuzo
Ornella Mitali Marebe
Divine Izabiriza
Linda Mutesi
Irene Ingabire
Arlette Sandra Segatashya
Eduige Uwase
Alice Umurerwa
Delmy Fazil Harerimana
Pax Elisée Mfura
Emmanuel Habimana
Christian Nyirumugisha Ngabo
Sandrine Umuhoza
Jeanne Marie Umuhoza
M.Gisele Dukuze
Jean Claude Hagati Nkusi
Oliva Kirabo
Valentin Uwayezu
Bernard Niyigena
Freud Ishimwe
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School
Maranyundo Girls School
Maranyundo Girls School
Maranyundo Girls School
Maranyundo Girls School
College St Marie Kibuye
College St Marie Kibuye
College St Marie Kibuye
College St Marie Kibuye
SOS Technical High School
SOS Technical High School
Groupe Scolaire des Parents
Groupe Scolaire des Parents
Groupe Scolaire Rulindo
Groupe Scolaire Rulindo
Groupe Scolaire Rulindo
Nyagatare Secondary School
Nyagatare Secondary School
Kiziguro Secondary School
Kiziguro Secondary School
Petit Seminaire Baptiste de Butare
5
3. Project Description
3.1. Introduction
In June 2013, the Electricity Unit of EWSA and Esri Rwanda decided to conduct the sixth Summer Camp
together. First meetings were held, an Memorandum of Understanding established and the scope of the
project was defined.
The general goals of the Esri Summer Camps in Rwanda is to show students the linkage between the
theory they learn in school and the practice they will encounter once they start working as professionals
some years later. This year, the Esri Summer Camp focussed on the electricity network facilities,
customer’s location and the way of improving customer care services in cooperation with the Electricity
Utility Planning Unit of the Energy Water and Sanitation Authority (EWSA). The Summer Camp should
serve as a pilot study to better understand the needs, to better estimates time and efforts for EWSA to
capture the Cash Power Meters within the Kigali City Limits. It should also showcase how this
information can be used to improve customer services.
The twenty best students in GIS from Secondary Schools of Rwanda were selected after a map
competition in late autumn to participate in the Esri Summer Cap 2013. Together with experts from
EWSA, CGIS-NUR, Esri Rwanda and Esri Germany the students were introduced to the Summer Camp
goals, field work and the use of GPS during the first day.
The following Imidugudu - part of the Kacyiru Antenna - were chosen as study area site:
Akarambo, Akaruvusha, Umucyo, Urugarama and Ururembo.
Team A1 & A2: Akarambo
Team B1 & B2: Akaruvusha
Team C1 & C2: Umucyo
Team D1 & D2: Urugarama
Team E1 & E2: Ururembo
Fig 1: Location of Imidugudu in Gacuriro Cell, Kinyinya Sector, Gasabo District, City of Kigali
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3.2. Field Work
The goal of the field work was to capture as many Cash Power Meter numbers, their location and
additional information as possible during the two days of field work. The GPS devices were prepared in
advance and had the boundaries of the Imidugudu and electricity information data as well as one empty
layer for the meter data to be captured (see Fig 2). Additionally each group was equipped with an A3
map showing the Umudugudu with a Satellite Image from 2012 (see Fig 3).
Fig 2: Geographic Data in ArcPad
Fig 3: Example map for field work
Fig 4: Teams at work
The questionnaire to collect electricity related data was kept as simple and short as possible (see Fig 5).
EWSA was interested in to get information about the meter number, Point of Connection but also on
some details e.g. name and phone number of the Land Lord to compare it with the existing customer
data base. This task was not part of the summer camp.
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Fig 5: Questionnaire for one household
The teams who completed their tasks in their Umudugudu started to help other groups on the
second day of field work.
3.3. Computer Lab
After fieldwork, the data from the 10 GPS devices was transferred to the computers in the lab at
ET SOS Kagugu. The resulting Point Shapefiles of all teams were loaded into ArcGIS Desktop (see
Fig 6).
Fig 6: Map of 766 collected Cash Power Meter data during field Work
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All teams entered the questionnaire information for each point collected in the field into a spread
sheets as shown in Fig: 7.
Fig 7: Questionnaire information transferred to Excel
3.4. Evaluation of the questionnaire
The data were analysed and corrected where applicable. However according to time
limitations not all typos and field information could be corrected during the Summer Camp.
Out of a total of some 750 records:






81 records did neither have a meter number nor a Point of Connection
333 points have a Point of Connection
206 points did not have a land lord name
457 points have a tenant name
7 meters numbers are duplicates
60 meters have not the correct meter number format (Too many or less numbers)
3.5. Data quality checks and data editing
After joining the tabular data to their respective identification number of the GPS POI the
data was analysed with the Geographic Information System ArcGIS 10.0. Then, students
started to correct the data captured using the questionnaires. Also, attributes of points
collected in the field were checked and corrected if necessary. Every group investigated the
errors and some corrected their data. The data was classified according to their category and
various symbolizations were applied by the different teams with ArcGIS Desktop. The
following map gallery shows the maps produced in class.
3.6. Maps
Each team created a map either with their team data captured in the field or with the data combined
from all teams. The maps are shown in Fig 8.
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Fig 8: Maps created in class
3.7. Introduction to Geometric Network
The pupils were introduced to Geometric Networks in general and afterwards made familiar with
its usefulness for utility companies. “A geometric network is composed of edges that are
connected. Connectivity rules for the network specify which edges are connected and at what
points they are connected, commonly referred to as junction or intersection points. These edges
can have weights or flow direction assigned to them, which dictate certain properties of these
edges that affect analysis results. In the case of certain types of networks, source points (points
where flow originates) and sink points (points where flow terminates) may also exist. In the case
of utility networks, a source point may correlate with an electric substation and a sink point may
correlate with a service connection at a residential household.” Source: Wikipedia
Questions like “What can you do with geometric networks?” were answered using the sandbox model
the instructors did for the chosen Imidugudu. The model was used to showcase different types of
analyses. The pupils were introduced in different type of the analyses that can be performed in a
geometric network. The table below provides an example of who might benefit from each kind of
analysis. Source: ArcGIS Desktop Help 10.0
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Analysis
Calculate the shortest path between two
points
Find all connected or disconnected
network elements.
Find loops or circuits in the network
Determine flow direction of edges when
sources or sinks are set
Trace network elements upstream or
downstream from a point.
Calculate the shortest path upstream from
one point to another.
Find all network elements upstream from
many points and determine which
elements are common to them all
Application
Various kinds of utility companies use this as a
method of inspecting the logical consistency of a network and verifying connectivity between two points
Electric companies can see which part of the network
is disconnected and use that information to figure out
how to reconnect it
An electrical short circuit can be discovered
Managers or engineers can see the direction of flow
along edges, and ArcGIS can use the flow directions to
perform flow-specific network analyses.
Water utilities can determine which valves to shut off
when a pipe bursts
Environmental monitoring stations can hone in on a
source of pollution in streams.
Electric utility companies can use the phone calls of
customers experiencing an outage to locate suspect
transformers or downed lines
4. Group Presentations
The four groups prepared individual Power Point Presentations which were presented during the Closing
Ceremony on Dec 6th, 2013. All presentations can be found in the Appendix I.
4.1. Group A - Field Work
Filed work was not as easy as expected. Most teams struggled to get access to the properties because of
late communication to the households. The group summarized field work findings as follows:









Nobody is at home or people do not open the gate
It takes sometimes very long to have them open the gate (up to 20 min)
People do not give their names/phone numbers (especially foreigners)
Embassies need special “treatment”
Information on Names/Phone Land Lord is not available/unknown
Dogs are preventing to enter the plot
Some houses did not have a POC (Point of Connection)
Some houses did not have electricity, so no meter
Many different type of cash power devices (meter numbers hard to detect or not available at
all)
The list of recommendation can be found in the chapter “Recommendations”
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4.2. Group B - Computer Lab
At the third day of the Summer Camp data entry stood on the program. All data captured in the
questionnaires were entered into Excel sheets.
Fig 9: Data entry of questionnaires into Excel
In addition data collected with GPS receivers were downloaded to the computers, visualised and
combined to one Shapefile in ArcGIS. After compilation of GPS data from all teams some errors were
easily visible. One example of a point outside the study area is shown in Fig 10.
Meter outside the
study area
Fig 10: Display of collected Cash Power Meters and errors
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Data correction involved cross-checking with the questionnaires
Typing error
9 digits instead of 10
Fig 11: Excel sheet with some marked errors
After some data correction Shapefile and Excel data from questionnaires were joined using the common
field POI – GPS Point Number (see Fig 12).
Fig 12: Joining tables using a common field
The resulting table was ready to be used for further analysis.
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Fig 13: The resulting table joined to the Meter Shapefile
4.3. Group C - Geometric Network
The third group introduced the elements and principles of a Geometric Network and its benefits for
Utility Networks. Its connectivity between network elements edges and junction as well as rule defined
for each data type. They also reported on the steps needed to build up a geometric network





Define the model
Create the geodatabase
Build the geometric network
Add data to the network
Create flow directions
It was a perfect transition to Group D showing the functionality of the sandbox Geometric Network live
on stage
4.4. Group D - Live demonstration of a Sand Box Geometric Network for EWSA
Fig 14: Role plays: Dispatcher and technician at the “EWSA hotline”
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The role play included one pupil at the hotline of EWSA which can be reached by the phone number
3535, a technician and three customers. The dispatcher showed the technician his new tool (the
Geometric Network in ArcGIS) which was introduced to better support customers. The first customer
called and reported that he has no electricity. Telling his meter number the dispatcher could
immediately locate him in the electricity network. Another customer reported also a power problem but
she did not know her meter number, but she could be located by her address. The third caller only gave
the telephone number and she could be found in the customer database as well.
With this information at hand the dispatcher used the Trace Upstream functionality to find out the
transformer supplying electricity to the three households (see Fig 16). The technician said that this
transformer has caused problems lately and he should do the repair as soon as possible. But with the
maintenance work on the transformer more customers will be affected. With the selection of all
affected customers from this transformer the dispatcher was going to send a bulk sms to inform EWSA
clients on maintenance work (see Fig 17).
Fig 15: Sandbox Network: Extended Low Voltage (underground cables) Electricity Network based on
EWSA power lines for Esri Summer Camp. “Gikondo II” serves as Power Supply for the Gacuriro Area.
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Fig 16: Upstream Trace of 3 customers calling EWSA Hotline 3535 up to the source
Fig 17: Affected households in case of maintenance at the transformer on the upper left
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5. Recommendations
The field work in the Imidugudu did not go as smoothly as expected. We were aiming for 50 households
per team/day. Instead only 35 households on average could be collected. Only participants of
Umuganda on Nov. 30, 2013 were well informed and opened the gates immediately and gave the
required information. The teams summarized the findings as follows:






Communicate early
Inform population by Radio, TV, Banners, Flyers, Umudugudu Chiefs, and other local authorities
(Sector, Cell)
Inform Embassies and NGOs by email, letters
Use multi-language speakers in such surveys
Give high priority to electricity supply at risk (e.g. cable are too close to houses)
Update meter information on time
During field work interviewed people took the opportunity to request:

Improved services like provision of electricity and maintenance done on time
The students also recommended:


The use of Trimble Juno GPS devices with ArcPad (GIS software for GPS) allowed the use of
prepared base map data which was very helpful in the field.
Make sure you write the correct numbers and other information required during field work
The pupils gave the following recommendation when entering data in the computer


Be careful when typing (4 eye principle recommended)
Be precise when recording the coordinates, have all GPS receivers prepared in the same way
Conclusion:
Having the correct data collected ensures that whatever goal we were targeting for can be
accomplished.
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6. Guest of Honour
After the group presentation our
Guest of Honour, the Director
General of Science, Technology and
Research, Dr Marie Christine
Gasingirwa thanked Esri Germany for
the sponsoring of the Summer Camp
and the involved teachers from
various institutions for their work.
According to the motto of the Esri
Summer Camps she emphasised the
importance of careful observation,
understanding and the right
application of information and data.
The Guest of Honour also mentioned
that the students learned how to
collect the right information, and
encouraged them to continue their
studies in this way to contribute to
Rwanda’s Vision 2020 to create
knowledge based society and use the
skills acquired to develop their
country.
Fig 18: Dr Marie Christine Gasingirwa, Director General for Science, Technology and Research at the
Ministry of Education giving the closing remarks at the Summer Camp Closing Ceremony.
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7. Appendix I Power Point Presentations
Esri Summer Camp 2013
together with EWSA Electricity Unit
Closing Ceremony
Group A, B, C and D Presentation
Esri Rwanda Ltd.
December 6th 2013, Kigali
1
© Esri Rwanda Ltd 2013
+ Group A
Field Work:
Meter Collection
2
© Esri Rwanda Ltd 2013
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Group A members
+ KIRABO Oliva, Nyagatare Secondary School
+ HAGATI NKUSI J. Claude, Nyagatare Secondary School
+ UWAYEZU Valentin, KIZIGURO Secondary School
+ MUTESI Linda, Maranyundo Girls School
+ UWASE CYUZUZO Mireille, Maranyundo Girls School
3
© Esri Rwanda Ltd 2013
Devices used
+ Well charged GPS receivers (Trimble)
4
© Esri Rwanda Ltd 2013
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Field Map on Paper
5
© Esri Rwanda Ltd 2013
Questionnaire
6
© Esri Rwanda Ltd 2013
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Field work procedure
+ Students were briefed in class before the field work
+ 4 students (2 teams)
per Umudugudu,
each with a guiding
instructor
+ Duration:
2 days
7
© Esri Rwanda Ltd 2013
Tasks in the field work
8
© Esri Rwanda Ltd 2013
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Tasks in the field work
+ Locating Cash Power Meters with GPS receiver
9
© Esri Rwanda Ltd 2013
Interviews
+ Face to face questionnaire
with the meter user
10
© Esri Rwanda Ltd 2013
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Meters collected
+ Five Imidugudu in (Gacuriro Cell, Kinyinya Sector) surveyed
> Akarambo
> Akaruvusha
> Umucyo
> Urugarama
> Ururembo
+ Meters estimated in the area:
~1 000
+ Surveyed meters: 766
11
© Esri Rwanda Ltd 2013
Observations and Challenges
> Nobody is at home or people do not open the gate
> It takes long to have them open the gate (~20 min)
> People do not give there names/phone numbers (especially
foreigners)
> Information on Names/Phone Land Lord is not available/unknown
> People informed on Umuganda gave immediate access &
information
12
© Esri Rwanda Ltd 2013
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Observations and Challenges
> Dogs are preventing to enter the plot
> Some houses did not have a POC (Point of Connection)
> Embassies need special “treatment”
> Some houses did not have electricity, so no meter
> Different type of cash power devices (meter numbers hard to detect
or not available at all )
> People asking for improved services (provision of electricity,
maintenance done on time)
13
© Esri Rwanda Ltd 2013
Recommendations to EWSA
> Communicate early
> Inform population by Radio, TV, Banners, Flyers, Umudugudu Chiefs,
and local authorities (Sector, Cell)
> Inform Embassies and NGOs
> Give high priority to electricity supply at risk (cable too close to
houses)
> Update meters information on time
> Use multilanguage speakers in such surveys
> Provide improved services (provision of electricity, maintenance done
on time)
14
© Esri Rwanda Ltd 2013
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+ Group B
Data Entry,
Correction,
and Display
15
© Esri Rwanda Ltd 2013
Group members
+ MITALI M Ornella: Maranyundo Girls school
+ UWASE Eduige: College St Marie
+ IZABIRIZA Divine: Maranyundo Girls school
+ NYIRUMUGISHA NGABO Christian: Groupe Scolaire des Parents
+ NIYIGENA Bernard: Kiziguro Secondary School
Instructors:
+ NYIRANTEZIMANA Solange
+ NDUNGU Sandra
+ SIKUBWABO Isaac
16
© Esri Rwanda Ltd 2013
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Data entry
+ Data captured with all the questionnaires from the different
villages was transferred to Excel.
17
© Esri Rwanda Ltd 2013
Data download
+ We downloaded the data from the GPS receivers
18
© Esri Rwanda Ltd 2013
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Data correction
+ Errors found in the data included:
> Making mistakes in recording the coordinates
> Typing mistakes
> Omission of some numbers (telephone, meters, etc.)
> Duplication of some numbers
Meter outside the study
area
19
© Esri Rwanda Ltd 2013
Data correction
+ Errors found in the data included:
Typing error
9 digits instead of 10
+ Correction involved;
> Cross-checking in the questionnaires
> Identifying and deleting meters falling outside the pilot area
20
© Esri Rwanda Ltd 2013
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Joining data
+ Data from the GPS receiver joined to data from questionnaires
using a common field.
21
© Esri Rwanda Ltd 2013
Result of the join
+ Both data from the Shapefile and Excel Sheet are combined in one
table for further analysis
23
© Esri Rwanda Ltd 2013
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24
© Esri Rwanda Ltd 2013
25
© Esri Rwanda Ltd 2013
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Conclusions and recommendations
+ Be careful when typing
+ Be precise when recording the coordinates
+ Make sure you write the correct numbers and other information
required
+ Conclusion: Having the correct data ensures that whatever goal
we were targeting for is accomplished.
26
© Esri Rwanda Ltd 2013
+ Group C
What is a
Geometric Network?
28
© Esri Rwanda Ltd 2013
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Group C
Group Members:
+ Umuhoza Jeanne
+ Ingabire Irene
+ Umurerwa Alice
+ Segatashya Sandra
+ Ishimwe Freud
+ Instructors:
+ Theodore
+ Théophile
+ Queen
29
© Esri Rwanda Ltd 2013
What is a Geometric Network?
+ Utility network (electricity and water network)
+ The real situation of the network on the field presented on a map.
+ Direction (From the source to destination).
+ Connectivity between network elements.
30
© Esri Rwanda Ltd 2013
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Steps needed to build up a geometric network
+ Define the model
+ Create the geodatabase
+ Build the geometric network
+ Add data to the network
+ Create flow directions
31
© Esri Rwanda Ltd 2013
Electricity Geometric Network
+ The components of our electricity network:
Transformer
32
LV lines
Kiosk
Connector
Meter
© Esri Rwanda Ltd 2013
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Basic Elements in Geometric Network
+ Edges (Lines)
+ Junctions (Points)
> Power lines
(HV, MV, LV, Connectors)
> Transformers
> Kiosks
> Poles
33
© Esri Rwanda Ltd 2013
Connections
+ It is not possible to connect a Medium Voltage line to a simple house.
House holds can only get Low Voltage
+ Power lines are supported by poles or pylons.
+ Customers get electricity from distribution panel (Kiosk)
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Captured information from the field
+ Cleaned up data
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How we came up with our geometric network
+ Combine existing
data from EWSA
+ Create underground
LV lines where needed
+ Add additional support
junction boxes
+ Define connectivity lines between
meters and support junction boxes
+ Add our collected meters
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Importance of geometric network
+ In case of power cut in an area, it is faster and easy to identify the
problem
+ At the time of maintenance in a certain area, it is easy to inform to the
affected customers.
+ It shows the distribution of electricity
+ Improvement of customer care services
+ It will lead to sustainable development
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+ Group D :
How to use a
Geometric Network
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Group members
+ Instructors:
> Maxime Rwaka
> Gilbert Kubwimana
> Jochen Manegold
+ Students:
> Pax Mfura Elisee
> Sandrine Umuhoza
> Gisele Dukuze
> Emmanuel Habimana
> Delmy Fazil
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How to use a Geometric Network?
+ Geometric Network for Customer support
> Scenario 1: Electrical power cut
> Scenario 2: Maintenance
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8. Appendix II Contact Information
Connie Schmidt
Esri Rwanda Ltd.
P.O. Box 6867
KG 666 Street, Kimihurura
Kigali, Rwanda
Email: [email protected]
Phone: +250 78 521 70 61
www.esri.rw
Kigali, December 2013
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