{"id":150,"date":"2015-11-22T17:16:53","date_gmt":"2015-11-22T17:16:53","guid":{"rendered":"http:\/\/www.noisemap.ltd.uk\/wpress\/?page_id=150"},"modified":"2018-10-10T15:31:59","modified_gmt":"2018-10-10T15:31:59","slug":"faq","status":"publish","type":"page","link":"http:\/\/www.noisemap.ltd.uk\/wpress\/training-and-support\/faq\/","title":{"rendered":"FAQ"},"content":{"rendered":"

See our User Forum<\/a> for many more FAQs<\/p>\n

Q. How can I easily tell what traffic flows are on each road?<\/strong>
\nA. Use the \u2018View as colour\u2019 function [View > View as colour].\u00a0 Check the View as colour On box, select Object type to colour to be Road Segments from the drop-down list and select Parameter to colour as Flow Rate from the drop-down list.
\nThen click Update View.
\nThe Road segments will now be coloured according to the traffic flow that they carry.<\/p>\n

Q. I am modelling a very long motorway improvement scheme.\u00a0 How can I easily load a small part of my noise model?<\/strong>
\nA. You should divide your scheme into a number of \u2018Named Areas\u2019.\u00a0 Firstly, open the Database Previewer and then select \u2018All populated tiles\u2019 and click Load.\u00a0 This will load the whole model.\u00a0 Now zoom to the area of interest and with the mouse, click in all the tiles covering that area.\u00a0 Now click Add and in the dialogue that appears, enter a name for the chosen area and click OK.
\nThis will create a new named area and when you load tiles in future, you can select just this area.\u00a0 You can have as many named areas as you wish.<\/p>\n

Q. How do I create a new scenario?<\/strong>
\nA. Firstly use the previewer to download the scenario that is most similar to the new scenario that you wish to create.\u00a0 You should then select File>Commit changes
\nYou will be asked whether you wish to save the changes to the existing scenario or to a new \u2018child\u2019 based on the current scenario.\u00a0 Select the \u2018New Child\u2019 option and type in a name for the new scenario.\u00a0 The new scenario will then be created.\u00a0 Any changes you make in the child scenario will not affect the parent, but changes in the parent will appear in the child, except where you have already altered that object in the child, in which case it doesn\u2019t change again.<\/p>\n

Q. How do I create a noise model automatically from a DXF file?<\/strong>
\nA. Firstly, you should make sure that the layers in the DXF file have not been compressed into a single layer. Each layer should contain only one type of object. Next, select the layer containing the object type of interest.\u00a0 Next choose Convert Layer from the View menu and follow the instructions.\u00a0 For more detail, look up Convert Layer in the User Manual.<\/p>\n

Q. How do I get height details into a NoiseMap model?<\/strong>
\nA. If your DXF or Shapefile has 3-D co-ordinates, then you can assign the height of the model objects directly from these (see Convert Layer in the User Manual.)\u00a0 Otherwise, if you have already imported a Ground Model (ie Ground Contours) you can \u2018drape\u2019 the new objects over the Ground Model.\u00a0 To do this, choose \u2018Automatically generate height from NoiseMap Ground Contours\u2019 when importing the DXF or Shapefile.<\/p>\n

Q. I have imported some road segments from a digital map, but the direction of traffic flow is wrong on the roundabouts.\u00a0 How can I fix this?<\/strong>
\nA. Firstly select the segments you wish to correct, then select Segment Tools from the Edit menu.\u00a0 Then select \u2018Reverse Segment Chain\u2019 (shortcut key \u2013 CTRL+X).\u00a0 The segments will be reversed automatically.<\/p>\n

Q. What is the best way of checking that the object heights in my model are correct?<\/strong>
\nA. To get a quick over-view of the heights of object, use the View-as-colour option from the View Menu.\u00a0 Check View as colour on.\u00a0 Height is the default View-as-colour option, so click Update View and all objects will be coloured according to their absolute height.\u00a0 You can also create a 3-d view, draw a cross-section or label the height of objects on the screen.<\/p>\n

Q. How do I calculate noise the coming from different parts of the road network?<\/strong>
\nA. If you want to know the amount of noise contributed by each source at a receiver, then select the receiver and select Show Segment Contribution from the Calculate menu.\u00a0 If you want to know the noise contribution from different Categories of road (eg, New Road, Existing Road) then you need to assign each segment or other source to a particular Category.\u00a0 See Categories and Combinations in the User Manual.<\/p>\n

Q. Why does NoiseMap seem to be ignoring some noise sources?<\/strong>
\nA. NoiseMap disregards noise sources that are more than the set cut-off distance (COD) from the calculation point.\u00a0 It also ignores line segments that subtend less than the cut-off angle (COD) at the calculation point.\u00a0 Check the settings in Parameters, Edit Global Parameters.\u00a0 Also ensure that the Category of the noise source is included in the Category Combination.<\/p>\n

Q. How do I show a noise contour over a bitmap of the area?<\/strong>
\nA. Firstly, load the Bitmap using the Edit, Load Bitmap function.\u00a0 Then load the noise contour of interest from the Calculate, Load Database Contour function.\u00a0 In the Contour Display Parameters Dialogue, select Draw Method to be White Bgnd (assuming the bitmap is on a white background), then click Apply.\u00a0 The bitmap should now appear behind the contour.<\/p>\n

Q. I have changed part of the noise model and now the noise contour has disappeared. Help!<\/strong>
\nA. When you change part of the noise model, any noise contours that are affected by that change will be marked as \u2018invalid\u2019.\u00a0 However, they are not lost.\u00a0 Select the area to download and the type of noise contour.\u00a0 Tiles with valid contours will turn green and tiles with invalid contours will turn red.\u00a0 Tiles without contours will remain purple.\u00a0 To download valid and invalid contours, uncheck the \u2018Only load valid contours\u2019 check box, and click load.<\/p>\n

Q. I have sent some contours to the calculation queue, but they haven\u2019t been calculated.\u00a0 <\/strong>
\nA. You need to connect your machine (or any other machine) to the calculation queue.\u00a0 Firstly, ensure that the computer is logged into the correct database and then select File, Connect to Calculation Queue.\u00a0 You will see the tiles being downloaded and calculated on the computer.<\/p>\n","protected":false},"excerpt":{"rendered":"

See our User Forum for many more FAQs Q. How can I easily tell what traffic flows are on each road? A. Use the \u2018View as colour\u2019 function [View > View as colour].\u00a0 Check the View as colour On box, select Object type to colour to be Road Segments from the drop-down list and select … Continue reading FAQ<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":24,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/pages\/150"}],"collection":[{"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/comments?post=150"}],"version-history":[{"count":4,"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/pages\/150\/revisions"}],"predecessor-version":[{"id":842,"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/pages\/150\/revisions\/842"}],"up":[{"embeddable":true,"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/pages\/24"}],"wp:attachment":[{"href":"http:\/\/www.noisemap.ltd.uk\/wpress\/wp-json\/wp\/v2\/media?parent=150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}