When exported as png, contour map always become "connectgaps: true"

polux · January 15, 2019, 10:48am

Hi,

I am trying to use plotly to produce a good looking 2D contour and then export it as a jpg. The image needs to be transparent were there is no data because I do not process full matrix. With “connected gap: false” this works great and the displayed image is fine. However one thing is never working:

When I either click on export on the toolbar OR automatically export as jpg (within java) the image suddenly become filled. The strange part is:

This is not the case for heatmap
This is not computer related as the plotly example is exporting correctly (https://plot.ly/python/contour-plots/ under Connect the Gaps Between None Values in the Z Matrix is fine)

I tried even copying the exact same code as in the example but it does still fail for my application. Is there a know issue with some versions?

Some informations:

I am using typescript and angular 2 for the applications. The following are the only relevant parts of the code but I can post any more if it is needed.

const data: Plotly.Data =
{
  z: z,
  colorscale:  colorscale,
  connectgaps: false,
  showscale: false,
  type: "contour",
  zsmooth: "best"
};

const layout = {displayModeBar: false,
showlegend: false,
xaxis: {
  autorange: true,
  showgrid: false,
  zeroline: false,
  showline: false,
  ticks: "",
  showticklabels: false,
  margin: 0
},
yaxis: {
  autorange: "reversed",
  showgrid: false,
  zeroline: false,
  showline: false,
  ticks: "",
  showticklabels: false,
  margin: 0
},
plot_bgcolor: "transparent",
paper_bgcolor: "transparent",
margin: {l: 0,
  r: 0,
  b: 0,
  t: 0,
},
};

this.cdRef.detectChanges();
Plotly.setPlotConfig({
    "displayModeBar": false,
     "connectgaps": false,
});

Plotly.newPlot("plotlyGeoUnit", [data], layout).then(
Plotly.toImage("plotlyGeoUnit", {format: "png", height: 400, width: 400}).then(result =>
    {
              //here I assign my image url
      }));

Results produced:

lower_jurrasic_filled
The result with contour

toto
The exact same code with just changing type to heatmap

I really need the contour lines as this is a topography and contour lines are the height of the terrain. This stupid bug is really locking me and any tip would be really appreciated. Thank you very much ^^.

etienne · January 15, 2019, 3:56pm

Thanks for the report!

Could you share your z data to help us reproduce this bug?

polux · January 15, 2019, 4:24pm

I could yes but I highly doubt this has any link since I tried with your example matrix here:

'z': [[None, None, None, 12, 13, 14, 15, 16],
      [None, 1, None, 11, None, None, None, 17],
      [None, 2, 6, 7, None, None, None, 18],
      [None, 3, None, 8, None, None, None, 19],
      [5, 4, 10, 9, None, None, None, 20],
      [None, None, None, 27, None, None, None, 21],
      [None, None, None, 26, 25, 24, 23, 22]],

So it occurs with any z matrix really. Moreover I am using something like 32 tests map and it happen with all of them.

But here is an example (size 50 usually it is 500X500:

Summary

0: (50) [-872.3775024414062, -909.0910034179688, -980.7688598632812, -1022.72998046875, -1060.6099853515625, -1127.618408203125, -1174.239990234375, -1200.464599609375, -1250, -1273.310791015625, -1325.760009765625, -1325.760009765625, -1344.699951171875, -1401.52001953125, -1401.52001953125, -1401.52001953125, -1439.3900146484375, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1477.27001953125, -1515.1500244140625, -1520.435546875, -1553.030029296875, -1553.030029296875, -1553.030029296875]
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4: (50) [-417.83245849609375, -454.5450134277344, -526.2236938476562, -600.7342529296875, -643.9390258789062, -681.8179931640625, -747.669189453125, -795.4550170898438, -833.3330078125, -871.2119750976562, -909.0910034179688, -946.969970703125, -1022.72998046875, -1022.72998046875, -1098.47998046875, -1098.47998046875, -1136.3599853515625, -1174.239990234375, -1174.239990234375, -1250, -1250, -1250, -1250, -1287.8800048828125, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1287.8800048828125, -1287.8800048828125, -1258.515625, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1287.8800048828125, -1303.7366943359375, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1363.6400146484375, -1363.6400146484375]
5: (50) [-304.19549560546875, -340.90899658203125, -416.6669921875, -454.5450134277344, -523.3099365234375, -568.1820068359375, -643.9390258789062, -670.1629028320312, -719.697021484375, -795.4550170898438, -817.5990600585938, -871.2119750976562, -890.1514892578125, -946.969970703125, -984.8480224609375, -1022.72998046875, -1060.6099853515625, -1098.47998046875, -1108.2459716796875, -1174.239990234375, -1174.239990234375, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1287.8800048828125, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625, -1325.760009765625]
6: (50) [-152.68051147460938, -224.94198608398438, -298.9508361816406, -340.90899658203125, -416.6669921875, -445.8039245605469, -520.3961791992188, -568.1820068359375, -606.0609741210938, -667.2491455078125, -719.697021484375, -757.5759887695312, -795.4550170898438, -871.2119750976562, -886.9463500976562, -946.969970703125, -1022.72998046875, -1022.72998046875, -1098.47998046875, -1098.47998046875, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1212.1199951171875, -1250, -1250, -1250, -1250, -1212.1199951171875, -1212.1199951171875, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1212.1199951171875, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1287.8800048828125, -1291.9593505859375, -1325.760009765625, -1325.760009765625]
7: (50) [-39.0443000793457, -75.75759887695312, -147.33859252929688, -221.81942749023438, -265.1520080566406, -340.90899658203125, -378.7879943847656, -442.61273193359375, -492.42401123046875, -568.1820068359375, -589.9520263671875, -643.9390258789062, -719.697021484375, -757.5759887695312, -810.7433471679688, -871.2119750976562, -946.969970703125, -958.0618286132812, -1022.72998046875, -1098.47998046875, -1098.47998046875, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1226.519775390625, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250]
8: (50) [112.47051239013672, 37.87879943847656, 0, -70.30406951904297, -144.35545349121094, -189.3939971923828, -265.1520080566406, -303.0299987792969, -365.66217041015625, -416.6669921875, -492.42401123046875, -568.1820068359375, -586.6792602539062, -660.9760131835938, -719.697021484375, -795.4550170898438, -871.2119750976562, -920.74609375, -956.2863159179688, -1022.72998046875, -1098.47998046875, -1098.47998046875, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1136.3599853515625, -1136.3599853515625, -1136.3599853515625, -1136.3599853515625, -1158.2476806640625, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1250, -1250, -1250, -1250, -1250, -1250, -1250, -1250]
9: (50) [263.98651123046875, 189.3939971923828, 113.63600158691406, 75.75759887695312, 7.159508228302002, -66.80821228027344, -113.63600158691406, -189.3939971923828, -227.2729949951172, -288.11468505859375, -362.67901611328125, -436.6466064453125, -492.42401123046875, -568.1820068359375, -643.9390258789062, -719.697021484375, -795.4550170898438, -871.2119750976562, -946.969970703125, -1022.72998046875, -1067.601318359375, -1098.47998046875, -1101.8780517578125, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1136.3599853515625, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1154.9346923828125, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1221.911865234375, -1250, -1250, -1250, -1250, -1250, -1250]
10: (50) [415.5014953613281, 340.90899658203125, 265.1520080566406, 227.2729949951172, 151.51499938964844, 84.70689392089844, 10.142637252807617, -37.87879943847656, -113.63600158691406, -189.3939971923828, -265.1520080566406, -340.90899658203125, -416.6669921875, -492.42401123046875, -568.1820068359375, -643.9390258789062, -719.697021484375, -806.546875, -880.528564453125, -993.1347045898438, -1067.601318359375, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1153.6397705078125, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1212.1199951171875, -1212.1199951171875, -1212.1199951171875, -1174.239990234375, -1174.239990234375]
11: (50) [567.0164794921875, 492.42401123046875, 416.6669921875, 378.7879943847656, 303.0299987792969, 236.22242736816406, 161.65768432617188, 87.68998718261719, 37.87879943847656, -37.87879943847656, -113.63600158691406, -209.37413024902344, -283.6488037109375, -396.2705993652344, -492.42401123046875, -568.1820068359375, -656.31396484375, -769.2310791015625, -871.2119750976562, -946.969970703125, -1022.72998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375]
12: (50) [756.4375610351562, 681.8179931640625, 606.0609741210938, 530.302978515625, 454.5450134277344, 387.7374267578125, 313.1726989746094, 239.20558166503906, 164.64083862304688, 90.67308807373047, 16.10889434814453, -96.1536636352539, -189.3939971923828, -282.18853759765625, -394.5223388671875, -492.42401123046875, -618.8812255859375, -719.697021484375, -804.7713623046875, -917.3770141601562, -991.8416137695312, -1027.6112060546875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1060.6099853515625, -1022.72998046875, -1022.72998046875, -1022.72998046875, -1022.72998046875, -1085.37109375, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1098.47998046875, -1152.0323486328125, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375, -1174.239990234375]
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proto: Array(0)

polux · January 16, 2019, 11:05am

I do not think that it could be z matrix related as this fail even with the plotly default example:

z: [[None, None, None, 12, 13, 14, 15, 16],
      [None, 1, None, 11, None, None, None, 17],
      [None, 2, 6, 7, None, None, None, 18],
      [None, 3, None, 8, None, None, None, 19],
      [5, 4, 10, 9, None, None, None, 20],
      [None, None, None, 27, None, None, None, 21],
      [None, None, None, 26, 25, 24, 23, 22]],

Moreover I used more than 10 topological maps (ans so more than 10 matrix) and varied the “null” value by testing either null, none or -infinity.

All resulted in the same connectgap failing, but ONLY when exporting. This is the view if I just display it:

Obviously it is a printScreen as the export button integrated in plotly complete the image

polux · January 17, 2019, 2:39pm

Any ideas? I still have not found any solutions.

etienne · January 17, 2019, 7:57pm

I wasn’t able to reproduce this bug.

Would you mind sharing a fully reproducible example to help us out?

polux · January 18, 2019, 3:33pm

I redid a small project with the exact same features (yarn and typescript) but it worked.

It appeared to me that when I started my project plotly was version:
“plotly.js”: “^1.42.5”,
and right now it is:
“plotly.js”: “^1.43.2”,
Apparently this solves the problem. I also changed @types/plotly from 14.1 to 14.3 which might have helped too.

So I am absolutely sorry but this post was about an issue of the previous version that you already corrected. But it is okay now (and this is why I could not have been reproduced I guess)

etienne · January 18, 2019, 3:42pm

No worries! Thank you for using plotly.js!

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When exported as png, contour map always become "connectgaps: true"

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