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Anonymous's avatar
Anonymous
Not applicable
6 years ago

Build Heat Map using x and y coordinates

Hello All,

How can we plot or use x and y coordinates instead of longitude and latitude in the heat map? 

Even a formula to convert x and y into longitude and latitude. 

 

Please let me know if this is possible.

 

Thank you, everyone!! 

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6 Replies

  • lbendlin's avatar
    lbendlin
    Super User
    6 years ago

    For small cardinalty of x and y:

     

    - Use a matrix visual

    - put your x data in the columns

    - put your y data in the rows

    - put your measure into the values

    - now use conditional formatting based on the measure. Use the same condition for font color and background color.

     

    Or use a scatter plot visual.

    • Anonymous's avatar
      Anonymous
      Not applicable
      6 years ago

      That won't help.

      I am looking forward to plotting my coordinates on the Heat Map, not onto the scatter plot visual.

       

      Thanks for responding.

    • Anonymous's avatar
      Anonymous
      Not applicable
      6 years ago

      Hi, Is it possible to plot the x and y coordinates on the heat map instead of longitude and latitude coordinates?

      For example,

      x-coordinates :454014 y-coordinates :4944234

       

      Thank you

  • Fortunato_INB's avatar
    Fortunato_INB
    Frequent Visitor
    6 years ago
    Hello Anonymous,
     
    I solved this issue by creating a function that transforms geographic coordinates (lat / long) into plane coordinates (UTM) in Power Query using the M language.

    Step 1 (Create the role):
    - Copy the code below.
    - Go to Power Query in the "Home" tab and click "Enter Data" and click "OK".
    - Click on the table that was just created, and click on "Advanced Editor".
    - Paste the code and click "Done".

    Step 2 (Invoke function):
    - Select the table you want to transform the coordinates.
    - In the "add column" tab, click "Invoke Custom Function".
    - Select the function you created and inform the columns that are the coordinates UTM (north and east), Hemisphere (N for north and S for South), Central Meridian and click "OK".

    Code (M language):
     

     

    let
/*Fórmula para converter coordenadas UTM para Geográficas
Desenvolvido por: José Carlos Fortunato - [email protected]*/
    UtmLatLong = (UTMeste as number,UTMnorte as number,Hemisferio as text,MeridianoCentral as number) =>
        let
        long0 = MeridianoCentral,
        Hem = Hemisferio,
        TextHem = Text.Upper(Hem),
        a = 6378137.0000,
        b = 6356752.3141,
        x = 500000 - UTMeste,
        y = UTMnorte,

        y1 = if TextHem = "S" or TextHem = "SOUTH" or TextHem = "SUL" then
        10000000 - y
        else y,

        M = y1 / 0.9996,
        e = Number.Sqrt(1 - Number.Power(b,2) / Number.Power(a,2)),
        mu = M / (a * (1 - Number.Power(e,2) / 4 - 3 * Number.Power(e,4) / 64 - 5 * Number.Power(e,6) / 256)),
        e1 = (1 - Number.Power((1 - Number.Power(e,2)),(1 / 2))) / (1 + Number.Power((1 - Number.Power(e,2)),(1 / 2))),

        j1 = (3 * e1 / 2 - 27 * Number.Power(e1,3) / 32),
        j2 = (21 * Number.Power(e1,2) / 16 - 55 * Number.Power(e1,4) / 32),
        j3 = (151 * Number.Power(e1,3) / 96),
        j4 = (1097 * Number.Power(e1,4) / 512),

        fp = mu + j1 * Number.Sin(2 * mu) + j2 * Number.Sin(4 * mu) + j3 * Number.Sin(6 * mu) + j4 * Number.Sin(8 * mu),

        e2 = Number.Power(e,2) / (1 - Number.Power(e,2)),
        c1 = e2 * Number.Power((Number.Cos(fp)),2),
        t1 = Number.Power(((Number.Sin(fp)) / (Number.Cos(fp))),2),
        r1 = a * (1 - Number.Power(e,2)) / Number.Power((1 - Number.Power(e,2) * Number.Power((Number.Sin(fp)),2)),(3 / 2)),
        n1 = a / Number.Power((1 - Number.Power(e,2) * Number.Power((Number.Sin(fp)),2)),(1 / 2)),
        d = x / (n1 * 0.9996),

        q1 = n1 * ((Number.Sin(fp)) / (Number.Cos(fp))) / r1,
        q2 = Number.Power(d,2) / 2,
        q3 = (5 + 3 * t1 + 10 * c1 - 4 * Number.Power(c1,2) - 9 * e2) * Number.Power(d,4) / 24,
        q4 = (61 + 90 * t1 + 298 * c1 + 45 * Number.Power(t1,2) - 3 * Number.Power(c1,2) - 252 * e2) * Number.Power(d,6) / 720,

        latrad = fp - q1 * (q2 - q3 + q4),

        lat = if TextHem = "S" or TextHem = "SOUTH" or TextHem = "SUL" then
            -1 * (latrad * (180 / Number.PI))
        else
            (latrad * (180 / Number.PI)),


        q5 = d,
        q6 = (1 + 2 * t1 + c1) * Number.Power(d,3) / 6,
        q7 = (5 - 2 * c1 + 28 * t1 - 3 * Number.Power(c1,2) + 8 * e2 + 24 * Number.Power(t1,2)) * Number.Power(d,5) / 120,

        longrad1 = (q5 - q6 + q7) / (Number.Cos(fp)),
        longrad2 = longrad1 * (180 / Number.PI),

        longi = if long0 < 0 then
            long0 - longrad2
        else
            long0 + longrad2

        in
        Table.FromRecords({[latitude = lat,longitude = longi]})
        
        //UtmLat = Table.AddColumn(UtmLatLong, "latitude", each List.First(UtmLatLong([este],[norte], "SUL", -45),1),type number),
        //UtmLong = Table.AddColumn(UtmLat, "longitude", each List.Last(UtmLatLong([este],[norte], "SUL", -45),1),type number)

in
UtmLatLong

     


    Hope this helps!
    • Anonymous's avatar
      Anonymous
      Not applicable
      5 years ago

      Fortunato_INB thank you for replying.  I followed the instruction and during Step 2, I didn't get any output back after Apply and close.  All we get is [Table] in our output row.

      Whereas, we were looking for long and lag fields. 

       

      However, I'm only able to transform just one row by manually entering the value before invoking the function (before STEP 2). We are looking for a solution when we refresh the data table the x and y coordinations are automatically transformed into long and lat.  

      Would you be able to suggest a solution or correct me? 

       

      Thank you