<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/" version="2.0">
  <channel>
    <title>tema Re: Save Georeferenced DWG in AutoCAD en AutoCAD Forum</title>
    <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8228004#M946436</link>
    <description>&lt;P&gt;First and foremost, you must determine what projection (coordinate system) in the UK you want to use for the final map. &lt;U&gt;In other words, how would you determine the red highlighted 'reference' point or what datum is that x and y referenced to?&lt;/U&gt; If you know that point then, of course you can do it, but it would be better with two points, not just one. Two points will account for any rotational effects.&amp;nbsp;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;lt;Let's say I picked a reference point on the drawing, say corner of a building and&amp;nbsp;the local coordinates&amp;nbsp;were&amp;nbsp;x-100/y-100.&amp;nbsp;Then found&lt;FONT color="#ff0000"&gt;&amp;nbsp;&lt;STRONG&gt;&lt;EM&gt;&lt;U&gt;reference point on the projected&amp;nbsp;&lt;/U&gt;&lt;/EM&gt;&lt;/STRONG&gt;&lt;/FONT&gt;&lt;SPAN&gt;&lt;FONT color="#ff0000"&gt;&lt;STRONG&gt;&lt;EM&gt;&lt;U&gt;coordinates,&amp;nbsp;let's&amp;nbsp;say x-1234/y-1234.&lt;/U&gt;&lt;/EM&gt;&lt;/STRONG&gt;&lt;/FONT&gt; Is there a tool in vanilla AutoCad where I could offset the whole drawing, i.e. move whole model on both axis by 1134?&amp;nbsp;&amp;gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Second, that reference point must be in meters, not latitude and longitude. If it is in lat/long, you'll need to perform an extra step and 'look up' the corresponding x/y values in meters (many free online tools&amp;nbsp;will easily do this).&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Third, I'm a little rusty (maybe not a little but a lot)&amp;nbsp;when selecting&amp;nbsp;UK datum, so if you set the projection in Global Mapper to British Grid, would you then know what datum to select?&amp;nbsp;There are many. (Alternatively,&amp;nbsp;you can use UTM.)&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="What datum to choose?" style="width: 776px;"&gt;&lt;img src="https://forums.autodesk.com/t5/image/serverpage/image-id/539541i14E9624F118256FC/image-size/large?v=v2&amp;amp;px=999" role="button" title="glomap-grid.png" alt="What datum to choose?" /&gt;&lt;span class="lia-inline-image-caption" onclick="event.preventDefault();"&gt;What datum to choose?&lt;/span&gt;&lt;/span&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Your&amp;nbsp;objective now&amp;nbsp;is to determine the location of &lt;EM&gt;that building corner &lt;/EM&gt;in the &lt;U&gt;real world&lt;/U&gt; using a &lt;U&gt;known coordinate system&lt;/U&gt;. If all you have is a 'local coordinate system' sometimes referred to as a site-specific coordinate system, then you are relegated to simply 'eyeballing' the location of the building and moving your all of your&amp;nbsp;line work&amp;nbsp;manually to the corner&amp;nbsp;(think cut-and-paste).&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
    <pubDate>Mon, 27 Aug 2018 20:07:03 GMT</pubDate>
    <dc:creator>ChicagoLooper</dc:creator>
    <dc:date>2018-08-27T20:07:03Z</dc:date>
    <item>
      <title>Save Georeferenced DWG in AutoCAD</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8225702#M946349</link>
      <description>&lt;P&gt;Hello, very new to using Autocad&amp;nbsp;so apologies if this question has been answered many times before.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I have been supplied with a DWG file which appears to have no georeferenced data. I have manually attempted to do this myself using the insert&amp;gt; set location routine. This appears to have worked well and the site layout overlays well to the imported bing map.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;What I was hoping to happen from here is saving the DWG would store the geolocation/co-ordinate&amp;nbsp;data within it. But appears not. I am trying to open this DWG in GlobalMapper software and it appears to projection data is stored within it.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Do I need to export the files in an alternative format? Any advise would be appreciated.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Regards, Steve&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;@Anonymous&lt;/a&gt;&lt;/P&gt;
&lt;P&gt;&lt;SPAN style="color: #808000;"&gt;john.vellek&lt;/SPAN&gt;&amp;nbsp;has edited your subject line for clarity:&amp;nbsp;Save Georeferenced DWG&lt;/P&gt;</description>
      <pubDate>Mon, 27 Aug 2018 15:54:23 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8225702#M946349</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2018-08-27T15:54:23Z</dc:date>
    </item>
    <item>
      <title>Re: Save Georeferenced DWG in AutoCAD</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8226130#M946358</link>
      <description>&lt;P&gt;Hello,&lt;BR /&gt;&lt;BR /&gt;Are you using Autocad MAP 3D or just regular Autocad?&lt;/P&gt;</description>
      <pubDate>Mon, 27 Aug 2018 15:54:41 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8226130#M946358</guid>
      <dc:creator>Michiel.Valcke</dc:creator>
      <dc:date>2018-08-27T15:54:41Z</dc:date>
    </item>
    <item>
      <title>Re: Save Georeferenced DWG in AutoCAD</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8226139#M946359</link>
      <description>&lt;P&gt;Hi, just regular AutoCad.&lt;/P&gt;</description>
      <pubDate>Mon, 27 Aug 2018 15:54:55 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8226139#M946359</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2018-08-27T15:54:55Z</dc:date>
    </item>
    <item>
      <title>Re: Save Georeferenced DWG in AutoCAD</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8227309#M946415</link>
      <description>&lt;P&gt;Hi&amp;nbsp;@Anonymous&lt;/a&gt;,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I see that you are visiting as a new member to the AutoCAD forum.&amp;nbsp;&lt;SPAN style="color: #808000;"&gt;Welcome to the Autodesk Community!&lt;/SPAN&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;When I use Geo (Geographic Location) and set this in my drawing I can view my aerial map just fine. I save my drawing and then reopen and this location is retained.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;If you reopen your drawing in AutoCAD, does it retain the information there? Is is just the other application that seems to be having this issue?&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&lt;SPAN style="color: #808000;"&gt;Please select the &lt;STRONG&gt;Accept as Solution&lt;/STRONG&gt; button if my post solves your issue or answers your question.&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Mon, 27 Aug 2018 15:55:13 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8227309#M946415</guid>
      <dc:creator>john.vellek</dc:creator>
      <dc:date>2018-08-27T15:55:13Z</dc:date>
    </item>
    <item>
      <title>Re: Save Georeferenced DWG in AutoCAD</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8227815#M946428</link>
      <description>&lt;P&gt;Regardless of what you've read, heard or are told by others, 'plain vanilla Acad' cannot save a your drawing with a georeference. This is because plain vanilla Acad doesn't have the capability to georefeference the dwg like Civil 3D or Map 3D. This, however, doesn't necessarily mean you can't 'fake-out' Global Mapper into thinking you are, indeed, using a 'known datum.'&lt;/P&gt;&lt;P&gt;If&amp;nbsp;both of the following&amp;nbsp;conditions are present in your Cad dwg:&lt;BR /&gt;1.Your x and y coordinate values coincide (or are identical) to a &lt;U&gt;projected coordinate&lt;/U&gt; system that uses either feet or meters (as opposed to a &lt;U&gt;geographic-coordinate&lt;/U&gt;-system-which-use-degrees) such as State Plane or UTM, then you can do it. If your drawing x's and y's are NOT coincidental, then it means your drawing's line work has been arbitrarily a) positioned, b) rotated and c) scaled in modelspace, and in cases such as these, you can't do it. Just because you can open the dwg or dxf in GM doesn't mean GM will magically provide a georeference.&lt;/P&gt;&lt;P&gt;2.You configure or assign the correct State Plane or UTM Zone to Global Mapper when opening the dwg or dxf in GM. For example when opening a dwg/dxf that is NOT georeferenced in Acad, the GM configuration looks like this:&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Glo Map configuration=&amp;gt;then Projection from panel on left." style="width: 772px;"&gt;&lt;img src="https://forums.autodesk.com/t5/image/serverpage/image-id/539513iC97E1E5776D1551A/image-size/large?v=v2&amp;amp;px=999" role="button" title="1-config-projection.png" alt="Glo Map configuration=&amp;gt;then Projection from panel on left." /&gt;&lt;span class="lia-inline-image-caption" onclick="event.preventDefault();"&gt;Glo Map configuration=&amp;gt;then Projection from panel on left.&lt;/span&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;If you are trying to establish a georeference to&amp;nbsp;an &lt;U&gt;un-referenced&lt;/U&gt; dwg, then you cannot simply force Global Mapper create a georeference for you because your dwg didn't provide the geospatial parameters which GM needs to do so.&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="2-This is the dxf in Vanilla Acad." style="width: 297px;"&gt;&lt;img src="https://forums.autodesk.com/t5/image/serverpage/image-id/539517i0066483C46416653/image-size/medium?v=v2&amp;amp;px=400" role="button" title="3-map-dxf.PNG" alt="2-This is the dxf in Vanilla Acad." /&gt;&lt;span class="lia-inline-image-caption" onclick="event.preventDefault();"&gt;2-This is the dxf in Vanilla Acad.&lt;/span&gt;&lt;/span&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="3-This is dxf 'opened' in GM. (Imagery added usnig GM.)" style="width: 400px;"&gt;&lt;img src="https://forums.autodesk.com/t5/image/serverpage/image-id/539519iB631EF322CB10EE3/image-size/medium?v=v2&amp;amp;px=400" role="button" title="2-layout-C.PNG" alt="3-This is dxf 'opened' in GM. (Imagery added usnig GM.)" /&gt;&lt;span class="lia-inline-image-caption" onclick="event.preventDefault();"&gt;3-This is dxf 'opened' in GM. (Imagery added usnig GM.)&lt;/span&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;In 2 and 3 above, you can see the&amp;nbsp;coordinates of that the blue point in vanilla Acad has transferred over to Global Mapper. If the coordinates in Acad were NOT correct, then they wouldn't be correct in GM either. &amp;nbsp;The blue point is NOT arbitrary, it has been placed at those coordinates on purpose. On purpose=coordinate geometry &lt;EM&gt;'know-how.'&lt;/EM&gt;&lt;/P&gt;&lt;P&gt;&lt;BR /&gt;NOTE: Earlier, in the configuration=&amp;gt;projection dialog of GM, the appropriate State Plane and Zone, which happens to be Texas State Plane, Central zone, was established.&amp;nbsp;(Again, knowing the correct St Pln and zone='&lt;EM&gt;know-how.'&lt;/EM&gt;&amp;nbsp;) If it wasn't established in GM then the Cad line work wouldn't be correct&amp;nbsp;because GM would've positioned the line work&amp;nbsp;arbitrarily.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;The key to this entire exercise is the Blue Point, or some other reference point, MUST have Coordinates that coincide, or are equal to State Plane, so that Global Mapper will treat those x and y numbers as State Plane. By treating those x/y's as State Plane you have effectively 'faked out' GM into thinking your drawing is georef'd even though your program, vanilla Acad, doesn't have the capability to GeoRef in the first place.&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;If you cannot get the blue dot accurately placed in Vanilla Cad, or you don't know how to place it even though you have the coordinates, then, sorry, you are stuck with a non-georef'd dwg.&lt;/P&gt;</description>
      <pubDate>Mon, 27 Aug 2018 18:49:30 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8227815#M946428</guid>
      <dc:creator>ChicagoLooper</dc:creator>
      <dc:date>2018-08-27T18:49:30Z</dc:date>
    </item>
    <item>
      <title>Re: Save Georeferenced DWG in AutoCAD</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8227906#M946431</link>
      <description>&lt;P&gt;Hi, Thanks for the detailed response ChicagoLooper,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;It appears I may&amp;nbsp;have problems getting the 'blue dot' placed correctly.&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;I&amp;nbsp;do&amp;nbsp;believe&amp;nbsp;the model has been scaled correctly, i.e. 1 meter in the DWG&amp;nbsp;is 1 meter on the British Nation Grid reference (I'm in UK). I'm led to&amp;nbsp;believe&amp;nbsp;this because using the Insert&amp;gt; Location&amp;gt; Set Location&amp;gt; From Map&amp;nbsp;procedure, using the above (BNG) projection, setting a reference point on both map and DWG, the whole drawing overlays accurately over the map. And I can see there is imported drawings of the surrounding site for which the model has been based.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;What I think my expectation from there was that the&amp;nbsp;DWG co-ordinates would be reassigned as the&amp;nbsp;projected co-ordinates. Which is obviously not the case now.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Let's say I picked a reference point on the drawing, say corner of a building and&amp;nbsp;the local coordinates&amp;nbsp;were&amp;nbsp;x-100/y-100.&amp;nbsp;Then found&amp;nbsp;reference point on the projected&amp;nbsp;&lt;SPAN&gt;coordinates,&amp;nbsp;let's&amp;nbsp;say x-1234/y-1234. Is there a tool in vanilla AutoCad where I could offset the whole drawing, i.e. move whole model on both axis by 1134?&amp;nbsp;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Alternatively, would this be a lot easier if I just used AutoCad Map 3D?&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Thanks.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Mon, 27 Aug 2018 19:24:27 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8227906#M946431</guid>
      <dc:creator>Anonymous</dc:creator>
      <dc:date>2018-08-27T19:24:27Z</dc:date>
    </item>
    <item>
      <title>Re: Save Georeferenced DWG in AutoCAD</title>
      <link>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8228004#M946436</link>
      <description>&lt;P&gt;First and foremost, you must determine what projection (coordinate system) in the UK you want to use for the final map. &lt;U&gt;In other words, how would you determine the red highlighted 'reference' point or what datum is that x and y referenced to?&lt;/U&gt; If you know that point then, of course you can do it, but it would be better with two points, not just one. Two points will account for any rotational effects.&amp;nbsp;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;lt;Let's say I picked a reference point on the drawing, say corner of a building and&amp;nbsp;the local coordinates&amp;nbsp;were&amp;nbsp;x-100/y-100.&amp;nbsp;Then found&lt;FONT color="#ff0000"&gt;&amp;nbsp;&lt;STRONG&gt;&lt;EM&gt;&lt;U&gt;reference point on the projected&amp;nbsp;&lt;/U&gt;&lt;/EM&gt;&lt;/STRONG&gt;&lt;/FONT&gt;&lt;SPAN&gt;&lt;FONT color="#ff0000"&gt;&lt;STRONG&gt;&lt;EM&gt;&lt;U&gt;coordinates,&amp;nbsp;let's&amp;nbsp;say x-1234/y-1234.&lt;/U&gt;&lt;/EM&gt;&lt;/STRONG&gt;&lt;/FONT&gt; Is there a tool in vanilla AutoCad where I could offset the whole drawing, i.e. move whole model on both axis by 1134?&amp;nbsp;&amp;gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Second, that reference point must be in meters, not latitude and longitude. If it is in lat/long, you'll need to perform an extra step and 'look up' the corresponding x/y values in meters (many free online tools&amp;nbsp;will easily do this).&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Third, I'm a little rusty (maybe not a little but a lot)&amp;nbsp;when selecting&amp;nbsp;UK datum, so if you set the projection in Global Mapper to British Grid, would you then know what datum to select?&amp;nbsp;There are many. (Alternatively,&amp;nbsp;you can use UTM.)&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="What datum to choose?" style="width: 776px;"&gt;&lt;img src="https://forums.autodesk.com/t5/image/serverpage/image-id/539541i14E9624F118256FC/image-size/large?v=v2&amp;amp;px=999" role="button" title="glomap-grid.png" alt="What datum to choose?" /&gt;&lt;span class="lia-inline-image-caption" onclick="event.preventDefault();"&gt;What datum to choose?&lt;/span&gt;&lt;/span&gt;&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Your&amp;nbsp;objective now&amp;nbsp;is to determine the location of &lt;EM&gt;that building corner &lt;/EM&gt;in the &lt;U&gt;real world&lt;/U&gt; using a &lt;U&gt;known coordinate system&lt;/U&gt;. If all you have is a 'local coordinate system' sometimes referred to as a site-specific coordinate system, then you are relegated to simply 'eyeballing' the location of the building and moving your all of your&amp;nbsp;line work&amp;nbsp;manually to the corner&amp;nbsp;(think cut-and-paste).&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Mon, 27 Aug 2018 20:07:03 GMT</pubDate>
      <guid>https://forums.autodesk.com/t5/autocad-forum/save-georeferenced-dwg-in-autocad/m-p/8228004#M946436</guid>
      <dc:creator>ChicagoLooper</dc:creator>
      <dc:date>2018-08-27T20:07:03Z</dc:date>
    </item>
  </channel>
</rss>

