Drawing level and cut/section plans (OS04) Explanatory notes

For the time being, overall site plans and field drawings will have to be filed in analogue form. As far as the drawing scale is concerned, a minimum requirement has been assumed; drawings to a more detailed scale are permitted unless determined otherwise in the Project Outline.

The symbols to be used in drawings will be in accordance with Table 9. The abbreviations to be used in drawings will be in accordance with the ABR.

Process description

Drawing an overall site plan or field drawing. Drawing sections, cuts and cumulative sections.

Products

- Field drawings + legends (if digital with hard copy and tables). - Digitised drawings with hard copy.

- Drawing register (if digital with hard copy). Actors

- The Senior Field Technician and/or Junior Archaeologist will create the field drawing. - The Medior Archaeologist checks whether the field drawing has been correctly created. Requirements with regard to resources

Scale of the field drawings

- Levels: minimum of scale 1:50 - Sections: minimum of scale 1:20 - Cuts minimum of scale 1:20 Drawing film

A drawing film which fulfils the following conditions:

- true to scale mm film (with a certain tolerance ‘shrink and stretch proof’); - weather-resistant;

- plasticizer-free;

- standard dimensions (no more than A0, no less than A3; DIN standard); - the upper long side will be perforated; DIN standard.

Drawing identification

- The drawing identification will be included in the right-hand top corner of the drawing film, under the perforated side.

- The drawing identification must be permanent.

The drawing identification will comprise the following information: - national registration number;

- Site Identification Code (optional);

- drawing number (reference number under which the drawing is documented in the drawing register);

- date (date on which a drawing is created);

- draughtsman (name of the person/persons who have created the drawing; if a number of people have worked on the drawing, an indication will be given as to who was responsible for what);

- trench (excavation trench number);

- level (number of a level within an excavation trench);

- section (reference to the location of the drawn section of a trench or excavation unit [north, east, south, west]);

- description (reference to the detail or cut that has been drawn, preferably including context and/or find number);

- scale (factor of reduction to which the drawing has been created and/or scale rule); - arrow pointing north;

Field drawing

- Shows contexts with codes.

- The drawing can be coloured true to life or alternatively colour codes can be used. The drawing must include a key, symbols and abbreviations (see ABR and Table 9). Drawings coloured ‘true to life’ must be coloured in the field. If coded colours are used, the colour codes relating to the phenomenon must be assigned in the field. The drawing can, if desired, be coloured elsewhere.

- Level and section drawings must link up.

- Drawings must be digitised unless stated otherwise in the Project Outline.

- A print-out must be available of a digitised drawing which print-out must comply with the requirements imposed on the film, scale, drawing identification and field drawing. Requirements applicable to the digitalisation of a field drawing

- The drawing must be a faithful copy of the field drawing. - The drawing must include a drawing identification. - The digital file must be a vector file.

- The digital drawing must be supplied in accordance with the standards and guidelines. Drawing register

Registration form (analogue, digital) must at least contain the following information: - drawing number;

- drawing type; - trench number; - subject.

Digital drawing in the field

- A back-up or hard copy must be made daily of digital drawings generated directly in the field.

- Back-ups must comply with the standards.

- Digital field drawings must comply with the same requirements (at least with regard to scale and drawing identification) as analogue field drawings.

- The digital file of the field drawing must be a vector file.

Table 9. Symbols used in drawings

Guidelines

Description Symbol Meaning

Find number Number in square box at the

location, or in the centre, of finds.

Reference to a find number in the event of there being insufficient space in the drawing

Line or arrow linking find- spot to square box with find number.

Reference to measured-in finds St Andrew’s cross.

Sample number Number with sample code in

square box.

Photo number Arrow points from camera to

object.

Context number Indicated by S. + no., for

example S51.

Reference to a context Context number, if possible

place outside the context with reference line.

Reference to a cut Dotted line over the context

indicates the location of the cut. Hooks indicate the direction of excavation.

Requirements with regard to resources

Description Symbol Meaning

NAP height 5.16 above Amsterdam

Ordnance Datum.

NAP height 3.10 m. below Amsterdam

Ordnance Datum. The point measured is placed accurately in the plan.

Reference to drawn sections Start and end points are

indicated on the trenches and site grid map by means of arrows or by (an) extra line(s) on the inside of the trench.

Continuation of Table 9. Symbols used in drawings

Description Symbol Meaning

Coordinates cross To indicate the main direction

of the x and y axis. Is always at right angles to other coordinate crosses and is only used on the grid points map.

Grid point Point measured in national

system of coordinates by surveyors, see SUF standard NEN 1878.

Main base point An upgraded basic point on the

datum line. Always at least 2 on a line.

Main zero point The most south-westerly

located main base point on the datum line. Basic point for all measurements or coordinate calculations.

Main grid marker Marker in excavation trench.

Is a upgraded grid marker. The measurement from the main zero point via the datum line to the excavation trench always refers to this point.

Grid marker Marker in excavation trench.

Datum line Line between 2 or more main

base points in a line.

Measuring line A line between 2 or more grid

points in a line, between one main measuring point and a grid point or between the main zero point and a grid point. Measuring line in the

excavation trench Between the main grid marker and another grid marker, between two grid markers or between derivatives (the measuring pins) of the main grid marker and the grid marker. At the point at which the centimetre lines cross on the drawing film, whole metres are indicated.

Continuation of Table 9. Symbols used in drawings

Description Symbol Meaning

Auxiliary measuring line in the excavation trench

The right angles, indicated on the inside with a quarter circle, have been measured precisely in the excavation trench measuring system. (This auxiliary measuring line will almost never be parallel or at right angles to the measuring lines in the trench.)

1. Fixed NAP height Directly derived from an official

Amsterdam Ordnance Datum bolt. The height is noted on the trenches and site grid map next to the symbol.

2. Derived NAP height Derived from 1.

Recent Interrupted line with

crosshatching.

Sloping layers The arrow points in the

direction in which the layers descend.

Cremation

Charcoal

Shells

Crosscut wood Draw section at the height of

the level.

Continuation of Table 9. Symbols used in drawings

Description Symbol Meaning

Inclined post Draw section at the height

of the level. The point of the arrow points to the underside of the post.

Brick format L x B x H ( in centimetres).

Stone Blue in colour.

Direction of span Stone arch and the like.

Direction of flow Sewers, gutters, etc.

Plastered side of wall

Underside Wall, woodwork, etc.

Direction of movement Ascending direction of

movement in the case of stairs.

Wall foundations If no cross section is drawn, _{note NAP height of the first} cut, the number of cuts and the underside of the wall. In this example there are three cuts.

Section Wall, woodwork, etc.

6.2.7 Identification and registration of features (OS05)

In document Dutch Archaeology Quality Standard (Page 151-156)