Show speedometer like needle with mschart - asp.net

I need to create a chart looking like one shown in the image below using mschart. I can create the half circle using transparent color for the lower half of the doughnut chart, but i am unable to find way to show the needle.
The half circle is 100% and in the image the indicator is on 23%.
Also if there is another way to show the same information with mschart I can change the geography of the chart.

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Multiple areachart overlaps each other so unable to hover over it

When I want to for example hover over my area chart dot symbols I could not do it because they could overlap each other.
See images:
Hover over event not triggered - No tooltip shows up
Hover over event triggered - Tooltip shows up
Maybe I can place the charts in the same layer or something like that to make it work properly?
What I noticed: As the charts loads in, the newer one covers the older one.
I could load the chart which has higher Y axis values first and than the charts with smaller Y axis values.
But that solution would only work in those cases where every single chart points are clearly bigger/smaller than the other chart's points.

when creating custom map in Highcharts I want to use a background image however the custom map scales differently

enter image description herePer this page (https://www.highcharts.com/docs/maps/custom-maps) I open inkscape, insert an image I want to draw over and then click on "resize page to selected object" with the image selected. This resizes the page to the size of my background image. I then create the shapes over the image as instructed in the page referenced above. What I want to do is when I paste the svg into the highcharts converter it keeps the shapes as drawn on the page so that I can then insert that same picture into the background of my highchart map on the page and the shapes I have drawn fit perfectly where I drew them on the image in inkscape. Instead it seems like the converter resizes the shapes to best fit the screen. If I didn't want the background image then this would be perfect however with this feature all the images drawn no longer "fit" in the background image where I drew them. Any way to get this to be a 1:1 size conversion so that inserting a background image works?

Doughnut Chart with transparent range and point marker in charts.js and angulaJS

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How to Fill in the Area Underneath an ASP.Net Spline Chart Control with a Color?

I have an ASP.Net Chart Control of ChartType "Spline", one ChartArea and one Series (it's a sparkline). I was just wondering if anyone out there knew how I could color the area underneath the line - I can't seem to find the property that allows me to do this without coloring the entire background.
Thanks in advance
You need to have a chart with a ChartType of Area to achieve this type of look (similar to google analytics). I have tried it and it does work although i'm not sure how you might get the line to be one particular colour and the area underneath to be a second colour?
http://social.msdn.microsoft.com/Forums/en-US/MSWinWebChart/thread/981cc4df-2b23-4557-8d89-0b45d553fecc/

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I want to draw on a Flex AreaChart. This AreaChart has an AnnotationElement that is an CartesianDataCanvas.
When I draw some items on this CartesianDataCanvas, the chart looks good when the item fits inside the chart.
But when I draw an item that is bigger than the chart, the chart automatically resize and try to fit my item inside the chart. I dont want my chart to resize automatically like that, but rather not showing the item part lay outside the chart. What should I do?
Thank you a lot,
Henry
what about scaling it manually?
before you draw it on the canvas, determine the sizes of AreaChart including width/percentWidth and same for height, and scale your graphics to fit the canvas/AreaChart.
If you want to do it right, research this canvas to next properties:
explicitMaxWidth and postLayoutTransformOffsets and this too setLayoutBoundsPosition () from documentation about AreaChart & CartesianDataCanvas
And let us know :)

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