First I create a table with a column for the name of the store, neighborhood and address.

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1 This document is an example of the possibilities of PostgreSQL, PostGIS and Geoserver. The document is work in progress. The author is Sijmen Wesselingh. He holds a Msc. Degree in Geographical Information Management and Applications. Within the document I create a database of all Albert Heijns in Utrecht and add spatial information as well. The administrative information is taken from the site of Albert Heijn. The spatial information is taken from the site of OpenStreetMap. In the document I usually start with a comment with what I want to achieve. Then I translate it to a SQL comment in Italic font. Then sometimes I post results in the form of a table or a map. For each step this is repeated. Enjoy reading. First I create a table with a column for the name of the store, neighborhood and address. create table winkels (naam varchar(200), wijk varchar(200), adres varchar(200)); Secondly I insert data for the Albert Heijns in Utrecht. I am starting with the Albert Heijn in my own neighborhood. insert into winkels values('ah Hondsrug 60, Utrecht','Lunetten','Hondsrug 60, 3524 BR, Utrecht'); For the next record I need to insert a quote character. Therefore the '' is used to make a ' insert into winkels values('ah ''t Goylaan, Utrecht','Hoograven','''t Goylaan 66G, 3525 AH, Utrecht'); For the next records no quotes are required insert into winkels values('ah Hammarskjoldhof, Utrecht','Kanaleneiland','Hammarskjoldhof 64, 3527 HE, Utrecht'); insert into winkels values('ah Handelstraat, Utrecht','Oog in al','handelstraat 77A, 3533 GJ, Utrecht'); insert into winkels values('ah Amsterdamsestraatweg, Utrecht','Ondiep','Amsterdamsestraatweg 367A, 3551 CK, Utrecht'); insert into winkels values('ah Amsterdamsestraatweg, Utrecht','Pijlsweerd','Amsterdamsestraatweg 56, 3513 AH, Utrecht'); insert into winkels values('ah Doornburglaan, Utrecht','Zuilen','Doornburglaan 2, 3554 EP, Utrecht'); insert into winkels values('ah Roelantdreef, Utrecht','Overvecht','Roelantdreef 41, 3562 KC, Utrecht'); insert into winkels values('ah Willem van Noortplein, Utrecht','Tuinwijk','Willem van Noortplein 6, 3514 GK, Utrecht'); insert into winkels values('ah Nachtegaalstraat, Utrecht','Wittevrouwen','Nachtegaalstraat 55, 3581 AD, Utrecht'); insert into winkels values('ah Burg Reigerstraat, Utrecht','Oudwijk','Burg Reigerstraat 57, 3581 KM, Utrecht'); insert into winkels values('ah Vondellaan, Utrecht','Rivierenwijk','Vondellaan 200, 3521 GZ, Utrecht'); insert into winkels values('ah Damstraat, Utrecht','Lombok','Damstraat 58, 3531 BW, Utrecht'); insert into winkels values('ah Godebaldkwartier, Utrecht','Binnenstad','Godebaldkwartier 149, 3511 DP, Utrecht'); insert into winkels values('ah Voorstraat, Utrecht','Binnenstad','Voorstraat 38, 3512 AP, Utrecht'); insert into winkels values('ah Twijnstraat, Utrecht','Binnenstad','Twijnstraat 8, 3511 ZK, Utrecht'); insert into winkels values('ah Troosterhof, Utrecht','Tuindorp','Troosterhof 6, 3571 NC, Utrecht'); I do a check on the number stores, which result in 17 stores. select count(*) from winkels; Now I can select all stores with a simple query select * from winkels;

2 The result is show in the following table. Naam Wijk Adres AH Hondsrug 60, Utrecht Lunetten Hondsrug 60, 3524 BR, Utrecht AH 't Goylaan, Utrecht Hoograven t Goylaan 66G, 3525 AH, Utrecht AH Hammarskjoldhof, Utrecht Kanaleneiland Hammarskjoldhof 64, 3527 HE, Utrecht AH Handelstraat, Utrecht Oog in al Handelstraat 77A, 3533 GJ, Utrecht AH Amsterdamsestraatweg, Utrecht Ondiep Amsterdamsestraatweg 367A, 3551 CK, Utrecht AH Amsterdamsestraatweg, Utrecht Pijlsweerd Amsterdamsestraatweg 56, 3513 AH, Utrecht AH Doornburglaan, Utrecht Zuilen Doornburglaan 2, 3554 EP, Utrecht AH Roelantdreef, Utrecht Overvecht Roelantdreef 41, 3562 KC, Utrecht AH Willem van Noortplein, Utrecht Tuinwijk Willem van Noortplein 6, 3514 GK, Utrecht AH Nachtegaalstraat, Utrecht Wittevrouwen Nachtegaalstraat 55, 3581 AD, Utrecht AH Burg Reigerstraat, Utrecht Oudwijk Burg Reigerstraat 57, 3581 KM, Utrecht AH Vondellaan, Utrecht Rivierenwijk Vondellaan 200, 3521 GZ, Utrecht AH Damstraat, Utrecht Lombok Damstraat 58, 3531 BW, Utrecht AH Godebaldkwartier, Utrecht Binnenstad Godebaldkwartier 149, 3511 DP, Utrecht AH Voorstraat, Utrecht Binnenstad Voorstraat 38, 3512 AP, Utrecht AH Twijnstraat, Utrecht Binnenstad Twijnstraat 8, 3511 ZK, Utrecht AH Troosterhof, Utrecht Tuindorp Troosterhof 6, 3571 NC, Utrecht I can use this table to deliver custom results. For example I can select all stores on the Amsterdamsestraatweg. select * from winkels where adres like '%Amsterdam%'; Naam Wijk Adres AH Amsterdamsestraatweg, Utrecht Ondiep Amsterdamsestraatweg 367A, 3551 CK, Utrecht AH Amsterdamsestraatweg, Utrecht Pijlsweerd Amsterdamsestraatweg 56, 3513 AH, Utrecht Two stores are returned which is right. There is 2 Albert Heijns on the Amsterdamsestraatweg. For example I can select all stores inside the Binnenstad (centrum) neighborhood (Notice strings need to be types case sensitive) select * from winkels where wijk = 'Binnenstad'; Naam Wijk Adres AH Godebaldkwartier, Utrecht Binnenstad Godebaldkwartier 149, 3511 DP, Utrecht AH Voorstraat, Utrecht Binnenstad Voorstraat 38, 3512 AP, Utrecht AH Twijnstraat, Utrecht Binnenstad Twijnstraat 8, 3511 ZK, Utrecht Three stores are returned which is right. There is 3 Albert Heijns on the Binnenstad within Hoog Catherijne, on the Voorstraat,and on the Twijnstraat. For example I can select all stores that may not be located on streets, roads or lanes. select * from winkels where adres not like '%straat%' and adres not like '%weg%' and adres not like '%laan%'; Naam Wijk Adres AH Hondsrug 60, Utrecht Lunetten Hondsrug 60, 3524 BR, Utrecht AH Hammarskjoldhof, Utrecht Kanaleneiland Hammarskjoldhof 64, 3527 HE, Utrecht AH Roelantdreef, Utrecht Overvecht Roelantdreef 41, 3562 KC, Utrecht AH Willem van Noortplein, Utrecht Tuinwijk Willem van Noortplein 6, 3514 GK, Utrecht AH Godebaldkwartier, Utrecht Binnenstad Godebaldkwartier 149, 3511 DP, Utrecht AH Troosterhof, Utrecht Tuindorp Troosterhof 6, 3571 NC, Utrecht

3 The results matches my expecations. 6 Stores are returned. The one in Lunetten is located on a passenger street, AH Kanaleneiland is within a shopping center, the AH in Overvecht is within a shopping center, the ones in Tuindorp and Tuinwijk are on a square, the one in Binnenstad is within a shopping center. Now I have executed some interesting select queries. The current table does however not offer too much information to do more interesting queries. I decided to extend the table with more information. I add a column for the telephone number, to see if a store is located within or outside the old city boundaries and to indicate if a store is a normal Albert Heijn, an Albert Heijn To Go or an Albert Heijn XL. After the last step I insert data for the AH to Go stores. I add three new columns. alter table winkels add column telefoon varchar(10); alter table winkels add column oudecentrum boolean; alter table winkels add column typewinkel varchar(8) ; The table is now extend with three new columns Naam Wijk Adres Telefoon Oudecentrum Typewinkel AH Hondsrug 60, Utrecht Lunetten Hondsrug 60, 3524 BR, Utrecht Next I update the telephone numbers. update winkels values set telefoon =' ' where naam='ah Hondsrug 60, Utrecht'; update winkels values set telefoon =' ' where naam='ah Hammarskjoldhof, Utrecht'; update winkels values set telefoon =' ' where naam='ah Twijnstraat, Utrecht'; update winkels values set telefoon =' ' where naam='ah Voorstraat, Utrecht'; update winkels values set telefoon =' ' where naam='ah Godebaldkwartier, Utrecht'; update winkels values set telefoon =' ' where naam='ah Amsterdamsestraatweg, Utrecht' and adres like '%56%'; update winkels values set telefoon =' ' where naam='ah Amsterdamsestraatweg, Utrecht' and adres like '%367A%'; update winkels values set telefoon =' ' where naam='ah Damstraat, Utrecht'; update winkels values set telefoon =' ' where naam='ah Vondellaan, Utrecht'; update winkels values set telefoon =' ' where naam ='AH Burg Reigerstraat, Utrecht'; update winkels values set telefoon =' ' where naam ='AH Nachtegaalstraat, Utrecht'; update winkels values set telefoon =' ' where naam ='AH Willem van Noortplein, Utrecht'; update winkels values set telefoon =' ' where naam='ah Roelantdreef, Utrecht'; update winkels values set telefoon =' ' where naam='ah Doornburglaan, Utrecht'; update winkels values set telefoon =' ' where naam='ah Handelstraat, Utrecht'; update winkels values set telefoon =' ' where naam='ah ''t Goylaan, Utrecht'; update winkels values set telefoon =' ' where naam='ah Troosterhof, Utrecht'; Now I have successfully added a phone number for each store. In the next step I indicate if the store is located within the boundaries of the old center This can be done with a simple query as three stores in the old center have the wijk naam 'Binnenstad' update winkels set oudecentrum='true' where wijk = 'Binnenstad'; update winkels set oudecentrum='false' where wijk!= 'Binnenstad'; In the next step I indicate the type of store. This is 'AH' or 'AH to go' or 'AH XL'. I haven't made data for AH to go yet. Therefore this step requires only two updates. update winkels set typewinkel = 'AH XL' where naam='ah Roelantdreef, Utrecht'; update winkels set typewinkel = 'AH' where naam!= 'AH Roelantdreef, Utrecht';

4 Now I add data for the AH to Go stores. Three insert on the 6 columns of the stores tables are executed. insert into winkels (naam, wijk, adres, telefoon, oudecentrum, typewinkel) values ('AH Stationshal, Utrecht','Binnenstad','Stationshal 1D, 3511 CE, Utrecht',' ','FALSE','AH to go'); insert into winkels (naam, wijk, adres, telefoon, oudecentrum, typewinkel) values ('AH Stationstraverse, Utrecht','Binnenstad','Stationstraverse 18, 3511 CE, Utrecht',' ','FALSE','AH to go'); insert into winkels (naam, wijk, adres, telefoon, oudecentrum, typewinkel) values ('AH Oudegracht, Utrecht','Binnenstad','Oudegracht 85, 3511 AD, Utrecht',' ','TRUE','AH to go'); select * from winkels Now I have a complete collection of the 19 Albert Heijns in Utrecht. Note that I haven't regarded Leidsche Rijn. With the next four inserts I add the stores in Leidsche Rijn as well. insert into winkels (naam, wijk, adres, telefoon, oudecentrum, typewinkel) values ('AH Hof ter Weydeweg, Utrecht','Leidsche Rijn','Hof ter Weydeweg 27, 3543 BC, Utrecht', ' ','FALSE','AH'); insert into winkels (naam, wijk, adres, telefoon, oudecentrum, typewinkel) values ('AH Hindersteinlaan, Vleuten','Vleuten','Hindersteinlaan 23, 3451 EV, Vleuten',' ','FALSE','AH'); insert into winkels (naam, wijk, adres, telefoon, oudecentrum, typewinkel) values ('AH Middenburcht, Vleuten','Vleuterwijde','Middenburcht 14, 3452 MT, Vleuten',' ','FALSE','AH'); insert into winkels (naam, wijk, adres, telefoon, oudecentrum, typewinkel) values ('AH Mereveldplein, De Meern','De Meern','Mereveldplein 13, 3454 CJ, De Meern',' ','FALSE','AH'); The following table displays the current stores. Naam Wijk Adres Telefoon OudeTypewinkel AH Amsterdamsestraatweg, Utrecht Ondiep Amsterdamsestraatweg 367A, 3551 CK, Utrecht f AH AH Hof ter Weydeweg, Utrecht Leidsche Rijn Hof ter Weydeweg 27, 3543 BC, Utrecht f AH AH Hindersteinlaan, Vleuten Vleuten Hindersteinlaan 23, 3451 EV, Vleuten f AH AH Middenburcht, Vleuten Vleuterwijde Middenburcht 14, 3452 MT, Vleuten f AH AH Mereveldplein, De Meern De Meern Mereveldplein 13, 3454 CJ, De Meern f AH AH Twijnstraat, Utrecht Binnenstad Twijnstraat 8, 3511 ZK, Utrecht t AH AH Voorstraat, Utrecht Binnenstad Voorstraat 38, 3512 AP, Utrecht t AH AH Godebaldkwartier, Utrecht Binnenstad Godebaldkwartier 149, 3511 DP, Utrecht t AH AH Hondsrug 60, Utrecht Lunetten Hondsrug 60, 3524 BR, Utrecht f AH AH Hammarskjoldhof, Utrecht Kanaleneiland Hammarskjoldhof 64, 3527 HE, Utrecht f AH AH Amsterdamsestraatweg, Utrecht Pijlsweerd Amsterdamsestraatweg 56, 3513 AH, Utrecht f AH AH Damstraat, Utrecht Lombok Damstraat 58, 3531 BW, Utrecht f AH AH Vondellaan, Utrecht Rivierenwijk Vondellaan 200, 3521 GZ, Utrecht f AH AH Burg Reigerstraat, Utrecht Oudwijk Burg Reigerstraat 57, 3581 KM, Utrecht f AH AH Nachtegaalstraat, Utrecht Wittevrouwen Nachtegaalstraat 55, 3581 AD, Utrecht f AH AH Willem van Noortplein, Utrecht Tuinwijk Willem van Noortplein 6, 3514 GK, Utrecht f AH AH Doornburglaan, Utrecht Zuilen Doornburglaan 2, 3554 EP, Utrecht f AH AH Handelstraat, Utrecht Oog in al Handelstraat 77A, 3533 GJ, Utrecht f AH AH 't Goylaan, Utrecht Hoograven t Goylaan 66G, 3525 AH, Utrecht f AH AH Troosterhof, Utrecht Tuindorp Troosterhof 6, 3571 NC, Utrecht f AH AH Stationshal, Utrecht Binnenstad Stationshal 1D, 3511 CE, Utrecht f AH to go AH Stationstraverse, Utrecht Binnenstad Stationstraverse 18, 3511 CE, Utrecht f AH to go AH Oudegracht, Utrecht Binnenstad Oudegracht 85, 3511 AD, Utrecht f AH to go AH Roelantdreef, Utrecht Overvecht Roelantdreef 41, 3562 KC, Utrecht f AH XL Again select queries can be performed as done earlier. For example I can select all Albert Heijns to Go. select * from winkels where typewinkel = 'AH to go' Naam Wijk Adres Telefoon Oudecentrum Typewinkel AH Stationshal, Utrecht Binnenstad Stationshal 1D, 3511 CE, Utrecht f AH to go AH Stationstraverse, Utrecht Binnenstad Stationstraverse 18, 3511 CE, Utrecht f AH to go AH Oudegracht, Utrecht Binnenstad Oudegracht 85, 3511 AD, Utrecht f AH to go The two AH to Go's in the Central Station station and the one in Oudegracht are correctly displayed.

5 For example I can select all Albert Heijns in the neighborhood 'Binnenstad' select * from winkels where wijk = 'Binnenstad' Naam Wijk Adres Telefoon Oudecentrum Typewinkel AH Twijnstraat, Utrecht Binnenstad Twijnstraat 8, 3511 ZK, Utrecht t AH AH Voorstraat, Utrecht Binnenstad Voorstraat 38, 3512 AP, Utrecht t AH AH Godebaldkwartier, Utrecht Binnenstad Godebaldkwartier 149, 3511 DP, Utrecht t AH AH Stationshal, Utrecht Binnenstad Stationshal 1D, 3511 CE, Utrecht f AH to go AH Stationstraverse, Utrecht Binnenstad Stationstraverse 18, 3511 CE, Utrecht f AH to go AH Oudegracht, Utrecht Binnenstad Oudegracht 85, 3511 AD, Utrecht f AH to go The six Albert Heijns located within the 'Binnenstad' are correctly displayed. Next I want to show the number of Albert Heijns per neighborhood, in alphabetic order. select wi.wijk as wijk, count(wi.naam) teller from winkels wi group by wi.wijk order by wi.wijk Wijk Aantal Binnenstad 6 De Meern 1 Hoograven 1 Kanaleneiland 1 Leidsche Rijn 1 Lombok 1 Lunetten 1 Ondiep 1 Oog in al 1 Oudwijk 1 Overvecht 1 Pijlsweerd 1 Rivierenwijk 1 Tuindorp 1 Tuinwijk 1 Vleuten 1 Vleuterwijde 1 Wittevrouwen 1 Zuilen 1 I see that the the 'Binnenstad' neighborhood has 6 Albert Heijns, all the other neighborhoods have one. Another query can be done to check weather all the telephone numbers are unique. select count(distinct(telefoon)) from winkels The result is 24 meaning every phone number is indeed unique. So up till now I showed SQL can be used for creating data and doing administrative analysis for example to search or count records. This is done with the package PostGreSQL.

6 With PostGIS spatial analysis can be done as well. For example I may want to make a map of the area in Utrecht that is less than 500m away from an Albert Heijn. I may make a cross table where the distance between each Albert Heijn is shown an ordered list from long to short. To do this point coordinates needs to be added for each Albert Heijn. The extension PostGIS to PostgreSQL should be used for this kind of operations. I looked up the WGS coordinate and the RD coordinate of each listed Albert Heijn with OpenStreetMap and Google Maps. For inserting geometry I take the following steps. The coordinate system for the Netherlands is looked up which is AMERSFOORT or RD I add a geometry column for point data in the Dutch coordinate system to the table with stores. SELECT AddGeometryColumn('winkels', 'geom', 28992, 'POINT', 2) I look up up the coordinates of each store using Google maps and Openstreetsmaps. I insert the RD coordinate of each Albert Heijn in Utrecht. I use a meter precision which should do. update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Twijnstraat, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Voorstraat, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Godebaldkwartier, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Hondsrug 60, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Hammarskjoldhof, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Amsterdamsestraatweg, Utrecht' and adres like '%56%'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Amsterdamsestraatweg, Utrecht' and adres like '%367A%'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Damstraat, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Vondellaan, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Burg Reigerstraat, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Nachtegaalstraat, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Willem van Noortplein, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Doornburglaan, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Handelstraat, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH ''t Goylaan, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Troosterhof, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Stationshal, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Stationstraverse, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Oudegracht, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Roelantdreef, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Hof ter Weydeweg, Utrecht'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Hindersteinlaan, Vleuten'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Middenburcht, Vleuten'; update winkels set geom = ST_GeomFromText('POINT( )',28992) where naam = 'AH Mereveldplein, De Meern'; (Finally to add a primary key I make the column of naam unique and set this column as primary key) (update winkels set naam = 'AH Amsterdamsestraatweg 2, Utrecht' where naam = 'AH Amsterdamsestraatweg, Utrecht' and adres like '%367A%';) (ALTER TABLE winkels ADD CONSTRAINT "MijnWinkel" PRIMARY KEY(naam);) The geometries are stored as an alphanumeric value in the stores table as show in the following table. Geometrie E4E81B B A0C41B AE D81B41

7 The result can be shown on with a mapping package. I installed and setup Geoserver to make a simple map of my database. I created a square blue icon to display the Albert Heijn locations. Hereby the result. Next I create two new spatial tables. One table will have a buffer of 500m around each AH location. The second table will have a buffer of 1000m around each AH location. create table winkels_br500 (naam, wijk, adres, telefoon, oudecentrum, typewinkel, geom) as select naam, wijk, adres, telefoon, oudecentrum, typewinkel, ST_Buffer(w.geom,500, 'quad_segs=8') from winkels w; create table winkels_br1000 (naam, wijk, adres, telefoon, oudecentrum, typewinkel, geom) as select naam, wijk, adres, telefoon, oudecentrum, typewinkel, ST_Buffer(w.geom,1000, 'quad_segs=8') from winkels w; (I add primary keys to both tables.) (alter table winkels_br500 ADD CONSTRAINT "MijnWinkelBr500" PRIMARY KEY(naam);) (alter table winkels_br1000 ADD CONSTRAINT "MijnWinkelBr1000" PRIMARY KEY(naam);) In the image on the next page I am showing the one kilometer buffers around the Albert Heijns in Utrecht. The style of the buffer areas is made transparent. I also requested a neighborhood map from the municipality of Utrecht as a background layer. Further I made a group showing the following layers -Albert Heijn points -Neighborhoods -Buffer around AH of 500 m -Buffer around AH of 1000m. The result are displayed on the next page.

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9 Later I could add customized icons, a thematic legend, and do more spatial analysis to show even more possibilities of PostGreSQL, PostGIS and Geoserver.