Very often, areas of operations may extend beyond the boundaries of a single sheet of a topographic map. In these cases, a working topographic map may consist of several sheets. For ease of use, the selected card sheets are pre-glued. The necessary sheets of the topographic map are glued to one another.
Gluing sheets of paper topographic maps, selection, procedure for trimming and gluing individual sheets of topographic maps.
For the correct gluing of the selected sheets of the topographic map, it is important to establish their relative position. If the work card will consist of several sheets, it is enough to take one sheet, look at the nomenclature of neighboring sheets, which is indicated on each side of the frame of the map sheet, and select the sheets required for gluing. In cases where the work card consists of a large number of sheets, their selection is somewhat complicated.
To speed up and facilitate the selection of sheets, it is recommended that you first draw up a layout for their location, using which you can quickly and accurately select the sheets necessary for gluing and correctly position them for gluing. At the same time, it should be emphasized that in order to correctly draw up the layout of sheets, you need to know the system for the layout of sheets of topographic maps of various scales, which is quite well described in textbooks on topography.
The procedure for trimming individual sheets of paper topographic maps before gluing them.
It is very important to glue the selected sheets correctly. Before proceeding with gluing, you need to do some preparatory work. First, you need to correctly cut the edges of the map sheets without cutting the card itself. Use a sharp knife or razor blade to cut off the edges of the card. Practice shows that when using scissors, cutting edges takes more time and the edges are uneven.
cards from gaps in the places of cutting and provides smooth edges of the sheets of the card. Cut off the edges of the card sheet in a certain order, which is determined by the convenience of working on it, as well as by the gluing process itself.
Previously, at the gluing points of all sheets, except the extreme right, the eastern (right) and southern (lower) sides of the map sheet are cut off according to its inner frame. In the last row, the southern (lower) fields of the gluing sheets are not cut.
The procedure for gluing individual sheets of paper topographic maps.
After the unnecessary fields of the map sheets are cut, they are glued in a certain order. Gluing can be done in columns or in rows. It is best to start gluing in a short direction. The figure below shows an example of gluing a card consisting of nine sheets.
First, the card sheets are glued vertically, forming gluing columns. In this case, first, the top sheet (2) is glued to the bottom (3), forming a column of two sheets. Then sheet 1 is glued onto the uncut field of sheet 2. As a result, a column of three sheets is formed, the eastern (right) field of which is cut off. Similarly, the sheets of the map of each subsequent column are glued together. After all the sheets of the columns are glued, proceed to gluing them together.
The gluing of the columns is from right to left. The sequence of gluing columns depends on the number of columns in the gluing. In our example, gluing is made of nine sheets that make up three columns of three sheets each. In this case, the second column is glued to the third, forming a gluing of six sheets. Then the first column is superimposed on the second column, previously glued to the third column. Thus, a gluing of nine sheets is prepared for a working topographic map..
When gluing a large number of sheets of a work card, a different order may be recommended. Glue is applied simultaneously on several sheets. With regard to gluing from nine sheets – simultaneously on three sheets. In this case, as shown in the figure below, sheets 2 and 3 are not cut by fields, and sheet 1 with the back side is superimposed on sheet 3 and the cut edge is aligned with the upper frame of sheet 3.
After that, a thin layer of glue is applied with a brush to the fields of three sheets prepared for gluing. Then turn sheet 1 and apply a cut field to the upper uncut edge of sheet 2, and place sheet 3 under the cut field of sheet 2. Thus, a gluing of three sheets is formed. Having done this simple operation, it is necessary to adjust the framework of the sheets to be glued. To do this, maps of roads, rivers, streams, horizontal and other images of terrain elements are combined at the joints of sheets of maps.
After this, several times should be glued with a soft rag. When the vertically glued sheets dry out, they begin gluing the vertical columns together, using the same techniques. The considered procedure for gluing a card creates convenience when working on it in any conditions.
Glued sheets of the card will not come off when using the eraser, and when working with a pencil, the sheets in the places of gluing will not bulge, since usually the lines are drawn from top to bottom or from left to right. In the same directions wash with an elastic band. In addition, the gluing process itself is facilitated in this order, since the top sheet in the column is glued to the bottom.
Features of bonding individual sheets of paper topographic maps.
When gluing a topographic map, it is recommended to use stationery glue, starch glue or regular paste. You should not get carried away by abundant blurring of the edges of the card, since in this case bulges form on the gluing sheets, which will create difficulties and inconveniences when using a work card. It is recommended to smear the edges of the card with a medium hard brush, carefully applying a thin layer of glue to the glued edges of the sheets.
Sometimes, due to the deformation of the paper, one sheet (within the frame) is somewhat longer or shorter than the other. To align the frames, a shorter sheet should be greased, since a greased, moist sheet can be stretched somewhat and adjusted to an adjacent sheet..
It is not recommended to glue a work card from a large number of sheets into one gluing, especially if it is to be used for work in the field or on a machine. In addition to the inconvenience of use, large glues are more often torn, acquire a convex shape and become unusable faster. It is more expedient, if necessary, to prepare cards from several glues.
Based on materials from the Officer’s Map book.
Pombrick I.D., Shevchenko N.A..