Project: ClickHouse (App Definition and Development / Database)
File: cell-towers.md

slug: /en/getting-started/example-datasets/cell-towers sidebar_label: Geo Data sidebar_position: 3 title: "Geo Data using the Cell Tower Dataset" import ConnectionDetails from '@site/docs/en/snippets/gatheryourdetails_http.mdx'; import Tabs from '@theme/Tabs'; import TabItem from '@theme/TabItem'; import CodeBlock from '@theme/CodeBlock'; import ActionsMenu from '@site/docs/en/snippets/serviceactionsmenu.md'; import SQLConsoleDetail from '@site/docs/en/snippets/launchsqlconsole.md'; import SupersetDocker from '@site/docs/en/snippets/addsupersetdetail.md'; In this guide you will learn how to: Load the OpenCelliD data in ClickHouse Connect Apache Superset to ClickHouse Build a dashboard based on data available in the dataset Here is a preview of the dashboard created in this guide: This dataset is from - The world's largest Open Database of Cell Towers. As of 2021, it contains more than 40 million records about cell towers (GSM, LTE, UMTS, etc.) around the world with their geographical coordinates and metadata (country code, network, etc.). OpenCelliD Project is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, and we redistribute a snapshot of this dataset under the terms of the same license. The up-to-date version of the dataset is available to download after sign in. <Tabs groupId="deployMethod"> <TabItem value="serverless" label="ClickHouse Cloud" default> ClickHouse Cloud provides an easy-button for uploading this dataset from S3. Log in to your ClickHouse Cloud organization, or create a free trial at . <ActionsMenu menu="Load Data" /> Choose the Cell Towers dataset from the Sample data tab, and Load data: ```sql DESCRIBE TABLE cell_towers ``` <SQLConsoleDetail /> This is the output of `DESCRIBE`. Down further in this guide the field type choices will be described. ```response nametype radio Enum8('' = 0, 'CDMA' = 1, 'GSM' = 2, 'LTE' = 3, 'NR' = 4, 'UMTS' = 5) mcc UInt16 net UInt16 area UInt16 cell UInt64 unit Int16 lon Float64 lat Float64 range UInt32 samples UInt32 changeable UInt8 created DateTime updated DateTime averageSignal UInt8 ``` </TabItem> <TabItem value="selfmanaged" label="Self-managed"> Download the snapshot of the dataset from February 2021: (686 MB). Validate the integrity (optional step): ```bash md5sum cell_towers.csv.xz ``` ```response 8a797f7bdb55faba93f6cbc37d47b037 cell_towers.csv.xz ``` Decompress it with the following command: ```bash xz -d cell_towers.csv.xz ``` Create a table: ```sql CREATE TABLE cell_towers ( radio Enum8('' = 0, 'CDMA' = 1, 'GSM' = 2, 'LTE' = 3, 'NR' = 4, 'UMTS' = 5), mcc UInt16, net UInt16, area UInt16, cell UInt64, unit Int16, lon Float64, lat Float64, range UInt32, samples UInt32, changeable UInt8, created DateTime, updated DateTime, averageSignal UInt8 ) ENGINE = MergeTree ORDER BY (radio, mcc, net, created); ``` Insert the dataset: ```bash clickhouse-client --query "INSERT INTO celltowers FORMAT CSVWithNames" < celltowers.csv ``` </TabItem> </Tabs> A number of cell towers by type: ```sql SELECT radio, count() AS c FROM cell_towers GROUP BY radio ORDER BY c DESC ``` ```response radioc UMTS 20686487 LTE 12101148 GSM 9931304 CDMA 556344 NR 867 5 rows in set. Elapsed: 0.011 sec. Processed 43.28 million rows, 43.28 MB (3.83 billion rows/s., 3.83

``` Cell towers by : ```sql SELECT mcc, count() FROM cell_towers GROUP BY mcc ORDER BY count() DESC LIMIT 10 ``` ```response mcccount() 310 5024650 262 2622423 250 1953176 208 1891187 724 1836150 404 1729151 234 1618924 510 1353998 440 1343355 311 1332798 10 rows in set. Elapsed: 0.019 sec. Processed 43.28 million rows, 86.55 MB (2.33 billion rows/s., 4.65 GB/s.) ``` Based on the above query and the , the countries with the most cell towers are: the USA, Germany, and Russia. You may want to create a in ClickHouse to decode these values. Using the function. Create a table where we will store polygons: <Tabs groupId="deployMethod"> <TabItem value="serverless" label="ClickHouse Cloud" default> ```sql CREATE TABLE moscow (polygon Array(Tuple(Float64, Float64))) ORDER BY polygon; ``` </TabItem> <TabItem value="selfmanaged" label="Self-managed"> ```sql CREATE TEMPORARY TABLE moscow (polygon Array(Tuple(Float64, Float64))); ``` </TabItem> </Tabs> This is a rough shape of Moscow (without "new Moscow"): ```sql INSERT INTO moscow VALUES ([(37.84172564285271, 55.78000432402266), (37.8381207618713, 55.775874525970494), (37.83979446823122, 55.775626746008065), (37.84243326983639, 55.77446586811748), (37.84262672750849, 55.771974101091104), (37.84153238623039, 55.77114545193181), (37.841124690460184, 55.76722010265554), (37.84239076983644, 55.76654891107098), (37.842283558197025, 55.76258709833121), (37.8421759312134, 55.758073999993734), (37.84198330422974, 55.75381499999371), (37.8416827275085, 55.749277102484484), (37.84157576190186, 55.74794544108413), (37.83897929098507, 55.74525257875241), (37.83739676451868, 55.74404373042019), (37.838732481460525, 55.74298009816793), (37.841183997352545, 55.743060321833575), (37.84097476190185, 55.73938799999373), (37.84048155819702, 55.73570799999372), (37.840095812164286, 55.73228210777237), (37.83983814285274, 55.73080491981639), (37.83846476321406, 55.729799917464675), (37.83835745269769, 55.72919751082619), (37.838636380279524, 55.72859509486539), (37.8395161005249, 55.727705075632784), (37.83897964285276, 55.722727886185154), (37.83862557539366, 55.72034817326636), (37.83559735744853, 55.71944437307499), (37.835370708803126, 55.71831419154461), (37.83738169402022, 55.71765218986692), (37.83823396494291, 55.71691750159089), (37.838056931213345, 55.71547311301385), (37.836812846557606, 55.71221445615604), (37.83522525396725, 55.709331054395555), (37.83269301586908, 55.70953687463627), (37.829667367706236, 55.70903403789297), (37.83311126588435, 55.70552351822608), (37.83058993121339, 55.70041317726053), (37.82983872750851, 55.69883771404813), (37.82934501586913, 55.69718947487017), (37.828926414016685, 55.69504441658371), (37.82876530422971, 55.69287499999378), (37.82894754100031, 55.690759754047335), (37.827697554878185, 55.68951421135665), (37.82447346292115, 55.68965045405069), (37.83136543914793, 55.68322046195302), (37.833554015869154, 55.67814012759211), (37.83544184655761, 55.67295011628339), (37.837480388885474, 55.6672498719639), (37.838960677246064, 55.66316274139358), (37.83926093121332, 55.66046999999383), (37.839025050262435, 55.65869897264431), (37.83670784390257, 55.65794084879904), (37.835656529083245, 55.65694309303843), (37.83704060449217, 55.65689306460552), (37.83696819873806, 55.65550363526252), (37.83760389616388, 55.65487847246661), (37.83687972750851, 55.65356745541324), (37.83515216004943, 55.65155951234079), (37.83312418518067, 55.64979413590619), (37.82801726983639, 55.64640836412121), (37.820614174591, 55.64164525405531), (37.818908190475426, 55.6421883258084), (37.81717543386075, 55.64112490388471), (37.81690987037274, 55.63916106913107), (37.815099354492155, 55.637925371757085), (37.808769150787356, 55.633798276884455), (37.80100123544311, 55.62873670012244), (37.79598013491824, 55.62554336109055), (37.78634567724606, 55.62033499605651), (37.78334147619623, 55.618768681480326), (37.77746201055901, 55.619855533402706), (37.77527329626457, 55.61909966711279), (37.77801986242668, 55.618770300976294), (37.778212973541216, 55.617257701952106), (37.77784818518065, 55.61574504433011), (37.77016867724609, 55.61148576294007), (37.760191219573976, 55.60599579539028), (37.75338926983641, 55.60227892751446), (37.746329965606634, 55.59920577639331), (37.73939925396728, 55.59631430313617), (37.73273665739439, 55.5935318803559), (37.7299954450912, 55.59350760316188), (37.7268679946899, 55.59469840523759), (37.72626726983634, 55.59229549697373), (37.7262673598022, 55.59081598950582), (37.71897193121335, 55.5877595845419), (37.70871550793456, 55.58393177431724), (37.700497489410374, 55.580917323756644), (37.69204305026244, 55.57778089778455), (37.68544477378839, 55.57815154690915), (37.68391050793454, 55.57472945079756), (37.678803592590306, 55.57328235936491), (37.6743402539673, 55.57255251445782), (37.66813862698363, 55.57216388774464), (37.617927457672096, 55.57505691895805), (37.60443099999999, 55.5757737568051), (37.599683515869145, 55.57749105910326), (37.59754177842709, 55.57796291823627), (37.59625834786988, 55.57906686095235), (37.59501783265684, 55.57746616444403), (37.593090671936025, 55.57671634534502), (37.587018007904, 55.577944600233785), (37.578692203704804, 55.57982895000019), (37.57327546607398, 55.58116294118248), (37.57385012109279, 55.581550362779), (37.57399562266922, 55.5820107079112), (37.5735356072979, 55.58226289171689), (37.57290393054962, 55.582393529795155), (37.57037722355653, 55.581919415056234), (37.5592298306885, 55.584471614867844), (37.54189249206543, 55.58867650795186), (37.5297256269836, 55.59158133551745), (37.517837865081766, 55.59443656218868), (37.51200186508174, 55.59635625174229), (37.506808949737554, 55.59907823904434), (37.49820432275389, 55.6062944994944), (37.494406071441674, 55.60967103463367), (37.494760001358024, 55.61066689753365), (37.49397137107085, 55.61220931698269), (37.49016528606031, 55.613417718449064), (37.48773249206542, 55.61530616333343), (37.47921386508177, 55.622640129112334), (37.470652153442394, 55.62993723476164), (37.46273446298218, 55.6368075123157), (37.46350692265317, 55.64068225239439), (37.46050283203121, 55.640794546982576), (37.457627470916734, 55.64118904154646), (37.450718034393326, 55.64690488145138), (37.44239252645875, 55.65397824729769), (37.434587576721185, 55.66053543155961), (37.43582144975277, 55.661693766520735), (37.43576786245721, 55.662755031737014), (37.430982915344174, 55.664610641628116), (37.428547447097685, 55.66778515273695), (37.42945134592044, 55.668633314343566), (37.42859571562949, 55.66948145750025), (37.4262836402282, 55.670813882451405), (37.418709037048295, 55.6811141674414), (37.41922139651101, 55.68235377885389), (37.419218771842885, 55.68359335082235), (37.417196501327446, 55.684375235224735), (37.41607020370478, 55.68540557585352), (37.415640857147146, 55.68686637150793), (37.414632153442334, 55.68903015131686), (37.413344899475064, 55.690896881757396), (37.41171432275391, 55.69264232162232), (37.40948282275393, 55.69455101638112), (37.40703674603271, 55.69638690385348), (37.39607169577025, 55.70451821283731), (37.38952706878662, 55.70942491932811), (37.387778313491815, 55.71149057784176), (37.39049275399779, 55.71419814298992), (37.385557272491454, 55.7155489617061), (37.38388335714726, 55.71849856042102), (37.378368238098155, 55.7292763261685), (37.37763597123337, 55.730845879211614), (37.37890062088197, 55.73167906388319), (37.37750451918789, 55.734703664681774), (37.375610832015965, 55.734851959522246), (37.3723813571472, 55.74105626086403), (37.37014935714723, 55.746115620904355), (37.36944173016362, 55.750883999993725), (37.36975304365541, 55.76335905525834), (37.37244070571134, 55.76432079697595), (37.3724259757175, 55.76636979670426), (37.369922155757884, 55.76735417953104), (37.369892695770275, 55.76823419316575),

55.782312184391266), (37.370493611114505, 55.78436801120489), (37.37120164550783, 55.78596427165359), (37.37284851456452, 55.7874378183096), (37.37608325135799, 55.7886695054807), (37.3764587460632, 55.78947647305964), (37.37530000265506, 55.79146512926804), (37.38235915344241, 55.79899647809345), (37.384344043655396, 55.80113596939471), (37.38594269577028, 55.80322699999366), (37.38711208598329, 55.804919036911976), (37.3880239841309, 55.806610999993666), (37.38928977249147, 55.81001864976979), (37.39038389947512, 55.81348641242801), (37.39235781481933, 55.81983538336746), (37.393709457672124, 55.82417822811877), (37.394685720901464, 55.82792275755836), (37.39557615344238, 55.830447148154136), (37.39844478226658, 55.83167107969975), (37.40019761214057, 55.83151823557964), (37.400398790382326, 55.83264967594742), (37.39659544313046, 55.83322180909622), (37.39667059524539, 55.83402792148566), (37.39682089947515, 55.83638877400216), (37.39643489154053, 55.83861656112751), (37.3955338994751, 55.84072348043264), (37.392680272491454, 55.84502158126453), (37.39241188227847, 55.84659117913199), (37.392529730163616, 55.84816071336481), (37.39486835714723, 55.85288092980303), (37.39873052645878, 55.859893456073635), (37.40272161111449, 55.86441833633205), (37.40697072750854, 55.867579567544375), (37.410007082016016, 55.868369880337), (37.4120992989502, 55.86920843741314), (37.412668021163924, 55.87055369615854), (37.41482461111453, 55.87170587948249), (37.41862266137694, 55.873183961039565), (37.42413732540892, 55.874879126654704), (37.4312182698669, 55.875614937236705), (37.43111093783558, 55.8762723478417), (37.43332105622856, 55.87706546369396), (37.43385747619623, 55.87790681284802), (37.441303050262405, 55.88027084462084), (37.44747234260555, 55.87942070143253), (37.44716141796871, 55.88072960917233), (37.44769797085568, 55.88121221323979), (37.45204320500181, 55.882080694420715), (37.45673176190186, 55.882346110794586), (37.463383999999984, 55.88252729504517), (37.46682797486874, 55.88294937719063), (37.470014457672086, 55.88361266759345), (37.47751410450743, 55.88546991372396), (37.47860317658232, 55.88534929207307), (37.48165826025772, 55.882563306475106), (37.48316434442331, 55.8815803226785), (37.483831555817645, 55.882427612793315), (37.483182967125686, 55.88372791409729), (37.483092277908824, 55.88495581062434), (37.4855716508179, 55.8875561994203), (37.486440636245746, 55.887827444039566), (37.49014203439328, 55.88897899871799), (37.493210285705544, 55.890208937135604), (37.497512451065035, 55.891342397444696), (37.49780744510645, 55.89174030252967), (37.49940333499519, 55.89239745507079), (37.50018383334346, 55.89339220941865), (37.52421672750851, 55.903869074155224), (37.52977457672118, 55.90564076517974), (37.53503220370484, 55.90661661218259), (37.54042858064267, 55.90714113744566), (37.54320461007303, 55.905645048442985), (37.545686966066306, 55.906608607018505), (37.54743976120755, 55.90788552162358), (37.55796999999999, 55.90901557907218), (37.572711542327866, 55.91059395704873), (37.57942799999998, 55.91073854155573), (37.58502865872187, 55.91009969268444), (37.58739968913264, 55.90794809960554), (37.59131567193598, 55.908713267595054), (37.612687423278814, 55.902866854295375), (37.62348079629517, 55.90041967242986), (37.635797880950896, 55.898141151686396), (37.649487626983664, 55.89639275532968), (37.65619302513125, 55.89572360207488), (37.66294133862307, 55.895295577183965), (37.66874564418033, 55.89505457604897), (37.67375601586915, 55.89254677027454), (37.67744661901856, 55.8947775867987), (37.688347, 55.89450045676125), (37.69480554232789, 55.89422926332761), (37.70107096560668, 55.89322256101114), (37.705962965606716, 55.891763491662616), (37.711885134918205, 55.889110234998974), (37.71682005026245, 55.886577568759876), (37.7199315476074, 55.88458159806678), (37.72234560316464, 55.882281005794134), (37.72364385977171, 55.8809452036196), (37.725371142837474, 55.8809722706006), (37.727870902099546, 55.88037213862385), (37.73394330422971, 55.877941504088696), (37.745339592590376, 55.87208120378722), (37.75525267724611, 55.86703807949492), (37.76919976190188, 55.859821640197474), (37.827835219574, 55.82962968399116), (37.83341438888553, 55.82575289922351), (37.83652584655761, 55.82188784027888), (37.83809213491821, 55.81612575504693), (37.83605359521481, 55.81460347077685), (37.83632178569025, 55.81276696067908), (37.838623105812026, 55.811486181656385), (37.83912198147584, 55.807329380532785), (37.839079078033414, 55.80510270463816), (37.83965844708251, 55.79940712529036), (37.840581150787344, 55.79131399999368), (37.84172564285271, 55.78000432402266)]); ``` Check how many cell towers are in Moscow: ```sql SELECT count() FROM cell_towers WHERE pointInPolygon((lon, lat), (SELECT * FROM moscow)) ``` ```response count() 310463 1 rows in set. Elapsed: 0.067 sec. Processed 43.28 million rows, 692.42 MB (645.83 million rows/s., 10.33 GB/s.) ``` Before building visualizations in Superset have a look at the columns that you will use. This dataset primarily provides the location (Longitude and Latitude) and radio types at mobile cellular towers worldwide. The column descriptions can be found in the . The columns used in the visualizations that will be built are described below Here is a description of the columns taken from the OpenCelliD forum: | Column | Description | |--|--| | radio | Technology generation: CDMA, GSM, UMTS, 5G NR | | mcc | Mobile Country Code: `204` is The Netherlands | | lon | Longitude: With Latitude, approximate tower location | | lat | Latitude: With Longitude, approximate tower location | :::tip mcc To find your MCC check , and use the three digits in the Mobile country code column. ::: The schema for this table was designed for compact storage on disk and query speed. The `radio` data is stored as an `Enum8` (`UInt8`) rather than a string. `mcc` or Mobile country code, is stored as a `UInt16` as we know the range is 1 - 999. `lon` and `lat` are

None of the other fields are used in the queries or visualizations in this guide, but they are described in the forum linked above if you are interested. Superset is easy to run from Docker. If you already have Superset running, all you need to do is add ClickHouse Connect with `pip install clickhouse-connect`. If you need to install Superset open the Launch Apache Superset in Docker directly below. <SupersetDocker /> To build a Superset dashboard using the OpenCelliD dataset you should: Add your ClickHouse service as a Superset database Add the table cell_towers as a Superset dataset Create some charts Add the charts to a dashboard <ConnectionDetails /> In Superset a database can be added by choosing the database type, and then providing the connection details. Open Superset and look for the +, it has a menu with Data and then Connect database options. Choose ClickHouse Connect from the list: :::note If ClickHouse Connect is not one of your options, then you will need to install it. The command is `pip install clickhouse-connect`, and more info is . ::: :::tip Make sure that you set SSL on when connecting to ClickHouse Cloud or other ClickHouse systems that enforce the use of SSL. ::: In Superset a dataset maps to a table within a database. Click on add a dataset and choose your ClickHouse service, the database containing your table (`default`), and choose the `cell_towers` table: When you choose to add a chart in Superset you have to specify the dataset (`cell_towers`) and the chart type. Since the OpenCelliD dataset provides longitude and latitude coordinates for cell towers we will create a Map chart. The deck.gL Scatterplot type is suited to this dataset as it works well with dense data points on a map. A deck.gl Scatterplot requires a longitude and latitude, and one or more filters can also be applied to the query. In this example two filters are applied, one for cell towers with UMTS radios, and one for the Mobile country code assigned to The Netherlands. The fields `lon` and `lat` contain the longitude and latitude: Add a filter with `mcc` = `204` (or substitute any other `mcc` value): Add a filter with `radio` = `'UMTS'` (or substitute any other `radio` value, you can see the choices in the output of `DESCRIBE TABLE cell_towers`): This is the full configuration for the chart that filters on `radio = 'UMTS'` and `mcc = 204`: Click on UPDATE CHART to render the visualization. This screenshot shows cell tower locations with LTE, UMTS, and GSM radios. The charts are all created in the same way, and they are added to a dashboard. :::tip The data is also available for interactive queries in the . This will populate the username and even the query for you. Although you cannot create tables in the Playground, you can run all of the queries and even use Superset (adjust the host name and port number). :::