For the problem of coordinates in CAD layout, please consult the problem of coordinates in CAD

First of all, use the cad command to query the actual coordinates of K1, the coordinates marked by the coordinate annotation command are the actual coordinates in CAD, not necessarily the coordinates of K1, if the coordinates of the query result are inconsistent with the coordinates of K1, then use the move command to move the figure to the same position as the actual coordinates.

Select the entire diagram, or select all the stake (point) elements you want to query, enter the command move, select k1 as the base point, and then enter the actual coordinates of k1, and the diagram will be moved to the correct position. In this case, use the coordinate annotation command, and the annotated coordinates will be consistent with the actual coordinates of k1.

After completing the above steps, use the id command or coordinate annotation command to find the coordinates of other pile positions, if you don't want to copy or copy the coordinates of each point one by one, then use the pline command to draw a line, connect the turning point of the line including the endpoint in turn, (for precision, open the snap), after completing the selection of the line, press f2, or enter the command list, the pop-up window has the x and y coordinates of each node of the line, copy it to excel, txt or word, you can unify.

Note that the original image must be unscaled, i.e. one element unit is equal to 1mm. For example, find two control points on the diagram and calculate its actual distance according to their coordinates, if the distance between the two control points is 135m, then the result measured by the CAD ranging tool should also be 135m, otherwise the diagram should be scaled, that is, we usually say 1:1 situation.

Also make sure that the image has not been rotated.

Friendly reminder: If it is a topographic map, then you should keep a backup when moving, because after the drawing is moved or rotated, its elevation point properties will change, and the wrong elevation will occur when cutting the section with CAD.

If you don't know the specifics, you can add me hi, id is gdx145943

Check if the (0,0) point can be seen on the current page, when the coordinate origin is not visible, the coordinate system only indicates the coordinate direction.

When the coordinate system flag is at the coordinate origin, it is a cross and a right angle when it is only directional.

I haven't opened the grid...

The xy axis displayed on the screen is not the position of the origin, it is displayed on your screen to help you determine the direction of the xy. When you draw a line, enter a 0,0 point and you will find the location of the origin.

The grid is just a drawing aid and can be turned off at any time.

If you don't mark it, of course it won't be displayed.

If you mean it needs to be displayed in model space.

It doesn't need to be displayed in the layout space.

You can use the feature of layer freezing in layout space.

The effect is as follows. <>

Red triangles are displayed as long as they are in model space.

This operation requires the red triangle to be on the same layer as the other primitives.

Then enter the layout space.

Double-click inside the viewport in layout space.

Then type layfrz when the mouse turns into a block.

Just select what you want to hide.

Put the coordinates into a layer, then turn the layer off or freeze, it won't be displayed, and you can open or unfreeze the layer to view it! This method, model, and layout change simultaneously!

The coordinate system in CAD is a mathematical coordinate system, and the coordinate system used for building positioning "annotation" is a measurement seat.

Standard system. In mathematics, the plane Cartesian coordinates take the vertical axis as the y-axis, and the upward direction from the origin point is positive and downward is negative; Take the horizontal axis as the x-axis, from the origin to the right is positive, to the left is negative; The quadrants are numbered in a counterclockwise direction. 

The plane Cartesian coordinate system on the measurement takes the longitudinal axis of the north-south direction as the x-axis, which is positive from the origin to the north and negative to the south. The horizontal axis in the east-west direction is the y-axis, and the east from the origin is positive and the west is negative; Quadrants are numbered in a clockwise direction.

From this, it can be seen that the plane Cartesian coordinates on the measurement are different from the plane Cartesian coordinates in mathematics, why?

The reason is that when the polar coordinates are used to represent the point in the measurement work, the angle value is calculated in the clockwise direction according to the north direction, and in the mathematics of the blind year, it is calculated in the counterclockwise direction according to the horizontal axis, and after the x-axis and y-axis are interchanged, all the trigonometric formulas in mathematics can also be directly applied in the measurement without any changes.

I don't know if there is this coordinate function in CAD, but this function of TENGEN developed on the basis of CAD is very good, I recommend you to install a TENGEN building - this is very powerful! The specific operation in Tianzheng is as follows:

Click on the coordinate annotation, first find a reference point (the point where you know the coordinate value) to mark a coordinate, and then change the newly annotated coordinate value to the actual value you know (this is very important), click the coordinate check, the point is OK, the command prompts you to click the coordinate, you click the coordinate just marked, prompts you with a wrong coordinate, you choose to correct the position according to the following prompt, this coordinate will run to the place corresponding to the coordinate value, this is you only need to move the whole picture (enter z first, space, Enter e, space, you can see the coordinates and your diagram, and then move it) to the position of the coordinate to correspond to the reference point, and then the marked coordinates will all be the actual coordinate values - I didn't know that this method took a lot of detours through calculation!

If there is something unclear, you can continue**.

Not particular! Press UCS space, 3 space: specify three points (origin, x-axis direction, y-axis direction) and you're done!

Set the dot at the 0,0 coordinate, and then type it according to the coordinates of the actual point indicated in the drawing.

The proportion is not particular, due to the time relationship, a command to solve, al command, alignment to choose two identical coordinate points to align, you can do it, all the coordinates correspond. If you don't understand, ask again.

Use. Steel CAD

Label registration xyab and other coordinates.

It's very convenient. This is a free program.

It's not that complicated, CAD is very accurate in drawing according to data, and you don't need to make any auxiliary lines.

The problem may be in the replication process.

When copying the original image, select a point as the base point, and after copying, find the point and use it as the base point to move the new image according to the original map data.

1. First of all, there is a question here, whether "drawing a 1:500 diagram in the middle of the sky" refers to a direct drawing at a scale of 1:500 or a 1:

1. To draw the plot and use 1:500 to draw later? This question is asked because in general it is relatively rare to take 1:

500 scale to direct drawing.

2. If the former is being referred to, the first point of Comrade Hustlz's statement is correct. It should also be noted that the statement that the operation that will be displayed at 1:100 later is not quite correct.

What you see in paper space is what you get, and the display scale is equivalent to the total plot scale, and the total plot scale = drawing scale * layout scale * viewport scale is the sum of the three. Your drawing scale is 1:500 and your layout scale is 1:

1. The total printing ratio you want is 1:100, that is, the viewport ratio you need to set is 5:1; To put it another way, 1:

If you want to display a 500 drawing at 1:100, you need to zoom in 5 times, which means that the viewport ratio is set to 5:1 as mentioned above.

3. Continuing above, this leads to another problem, the display ratio you want, that is, the change of the printing ratio from 1:500 to 1:100, will be associated with the change of the size of the layout paper, such as 1:

At 500, the A3 paper is about in the middle, but when it becomes 1:100, the A3 paper is no longer sufficient.

4. Pick up the first point, if it is a 1:1 drawing, use 1:500 to draw later.

It's as simple as calculating the paper size required for 1:500 in the Layout Settings and making the corresponding selections (the layout scale is generally set to 1:1), then creating a new viewport in paper space and setting the viewport scale to 1:

500 is enough, and I won't repeat it by moving the position with the pan. Second, if you want to change the display to 1:100, you also need to recalculate the required paper size in the "Layout Settings" (the layout scale is also set to 1:).

1) Create a new 1:100 scale viewport in paper space.

I don't know if you understand it like this, I hope it will help people.

The picture drawn inside the tensho is 1:500. If you use the A1 box (1:1) in the layout, then the diagram is 1:500

Insert a 1:1 frame, then open the viewport, click on the square viewport, and draw a square. Then double-click the box and set the ratio in the viewport bar to 1:1. If the position is not suitable, it can be supported by the pan command.

If you want to display it as 1:100, then you need to reduce the box to a multiple. Repeat what you just did.

window print, and set the print scale in the print settings.