Explication on a Site Plan: What It Is and Why You Need It

An explication on a site plan is a detailed list of all elements, objects, and zones present on your property, with their precise descriptions, dimensions, materials, and functional purposes. It serves as a key to understanding the landscape project, providing clarity for you, builders, and suppliers, and helps avoid costly mistakes during implementation. Without an explication, even the most beautiful plan can remain an incomprehensible set of lines and symbols.

What is an Explication and Why is it Important?

An explication (from Latin explicatio — explanation, unfolding) is an integral part of any detailed landscape project. It represents a tabular or list-based description of all conventional symbols, signs, and color schemes used on the graphical site plan. Essentially, it's a legend that translates graphics into understandable text, allowing for unambiguous identification of each element – from a building to a type of shrub and the material of a pathway.

The importance of an explication cannot be overstated. It is the link between an idea and its realization. For the property owner, an explication provides a complete understanding of the future appearance of the territory, helping to control the process and budget. For contractors, it is a clear technical specification, minimizing misinterpretations and errors. For example, without an explication, it's easy to confuse a barbecue area with a playground or order the wrong type of paving stones. This can lead to rework, which often costs tens of thousands of rubles and delays the project by weeks.

Key Sections of an Explication

A well-composed explication typically includes several key sections, each detailing a specific group of site elements:

• Site Zones: Description of functional zones — residential, utility, recreational, sports, garden-orchard. For example, “Recreation area with gazebo” or “Fruit and berry garden.”
• Buildings and Structures: All capital constructions and small architectural forms — residential house, garage, bathhouse, guest house, gazebo, pergola, greenhouse, canopy, shed. Their dimensions and purpose are indicated.
• Landscaping Elements: Road and path network (paths, walkways, paved areas), parking spaces, terraces, patios, retaining walls, stairs, bridges. For each element, it is important to specify the type of paving (tiles, gravel, wood, asphalt) and dimensions. For example, for pedestrian paths, a typical width is 0.8-1.2 meters, and for a car entrance – 3-3.5 meters.
• Water Features: Fountains, ponds, waterfalls, streams, swimming pools. Here, their type, dimensions, depth, and materials used (liner, concrete, stone) are described.
• Planting: Dendroplan (trees, shrubs with species and varieties indicated), flower beds, lawns (rolled, seeded), rockeries, alpine gardens. It is important to indicate not only the plant name but also the quantity and planting specifics.
• Engineering Systems: Lighting (types of fixtures, their placement), irrigation systems (automatic, drip), drainage systems, storm sewers. Key nodes and communication routes are noted.

How to Create an Explication Correctly: A Step-by-Step Guide

Creating an explication is a systematic process that requires attention to detail. Here's a step-by-step guide:

1. Inventory and Zoning: Start by clearly zoning the plot, defining all functional areas. Then, compile a complete list of all existing and planned objects and elements within each zone. For example, on a 12-acre plot, you might identify 4-5 main zones.
2. Object Detailing: For each item on the list, describe its characteristics as thoroughly as possible: purpose, exact dimensions (length, width, height), materials used, quantity, special requirements for installation or care. For example, “Recreation area: 15 m², surfacing – larch decking, Grade A.”
3. Assigning Symbols and Numbers: Assign a conventional symbol (graphic symbol) and/or a sequential number to each unique element or group of similar elements. This will significantly simplify reading the plan. For example, all trees can be represented by circles of different diameters, and each type of tree by its own number (T1, T2).
4. Table Formation: It is convenient to present all collected information in a table. Columns may include: “No. p/p,” “Conventional Symbol on Plan,” “Element/Zone Name,” “Characteristics (material, size),” “Quantity.”
5. Interconnection with the Plan: Ensure that every symbol or number in the explication has an exact correspondence on the graphical site plan. Use arrows or callouts on the plan to indicate specific elements, referencing their numbers in the explication.

Common Mistakes When Working with Explications

Even experienced designers can make mistakes when creating or using an explication. Knowing the most common problems can help avoid them:

• Incomplete Data: The most common mistake is the absence of key information, such as exact dimensions, materials, or the quantity of elements. For example, the plan indicates a “flower bed,” but there is no area or list of plants. This leads to constant clarification and delays. A typical delay due to ambiguity in the explication can be 1-2 days at each stage of work.
• Inconsistency with the Plan: A symbol or number is on the plan but missing from the explication, or vice versa. This causes confusion and errors during work.
• Lack of Unification: Using different symbols for the same elements or, conversely, one symbol for different objects. This makes the explication useless.
• Excessive Detail: Including too many minor and insignificant details in the explication, which clutter the document and make it difficult to read without providing practical benefit.
• Ignoring Changes: Landscape design projects often change during the process. An unupdated explication becomes a source of problems. For example, paths were initially laid, but then it turned out they interfered with laying cables for lighting because their location changed, but the explication was not updated.
• Lack of Link to Estimates: An explication without a connection to the budget and estimate does not provide a complete picture of the project cost.

Explication and Zoning: The Interconnection

Explication and site zoning are two complementary tools in landscape design. Zoning defines the overall structure of the plot, dividing it into functional areas (e.g., recreation zone, utility zone, front yard). The explication then deepens this division, detailing each element within these zones.

Imagine you have zoned a plot and designated a “Recreation Area.” The explication will then reveal what exactly is included in this area: “Gazebo (wooden, 3x4 m),” “Barbecue zone (with brick firebox),” “Lawn (sports type),” “Decorative shrubs (list of species),” “Garden benches (2 pcs.).” Thus, zoning provides the big picture, while explication gives a clear understanding of the content of each fragment of that picture. You can read more about zoning in our article: Zoning a Plot from Scratch: How to Divide Space Smartly.

How to Plan Your Plot and Create an Explication in FormSpace

FormSpace offers intuitive tools that significantly simplify the process of planning your plot and gathering data for a future explication. Start with “Module 1.0 (Site Plan)” or “Module 2.1 (AI Concept)” to lay the foundation for your project. You can upload a photo of your plot or draw a basic sketch, then define the main functional zones – residential, recreational, utility. This will allow you to visualize the overall structure and begin distributing elements across the territory, which is the first step towards creating an explication.

Next, use “Module 1.x (Objects)” to detail each zone. Here you can add specific elements such as paths, trees, shrubs, gazebos, and water features. For each object, FormSpace allows you to specify its name and dimensions. While FormSpace does not directly generate a formal explication table, it helps gather all necessary data: you place a “barbecue” or a “bench,” see their dimensions, and can immediately record this data for your explication. Using “Module 3.1 (Design by Photo),” you can see how these elements will look in a real setting, which will help refine their characteristics and ensure the accuracy of the data for your explication before work begins.

Frequently Asked Questions

What is the difference between an explication and a plan legend?

The terms are often used synonymously, but there is a nuance. A legend usually presents a brief list of conventional symbols with their explanations. An explication, however, is a deeper and more detailed document that not only explains symbols but also provides detailed characteristics of each element: dimensions, materials, quantity, functional purpose. It includes information that is not always appropriate in a brief legend.

Is an explication needed for a small plot (6 ares)?

Yes, absolutely. The size of the plot does not negate the need for clear planning. Even on 6 ares, you can place many functional zones and objects: a house, a garage, a recreation area, a garden, flower beds. An explication will help maximize the efficient use of every square meter, avoid errors in element placement, and ensure a harmonious combination of all parts of the landscape.

Who typically creates an explication?

An explication is most often created by a landscape designer or architect who develops the site project. They possess the necessary knowledge of standards, symbols, and documentation requirements. However, the property owner can and should participate in this process, providing their wishes and controlling the completeness and accuracy of the information. When planning independently, the owner creates the explication themselves.

Can universal symbols be used for an explication?

Yes, there are generally accepted graphic symbols in landscape design and architecture. Using universal symbols makes the plan more understandable for any specialists. However, for specific or non-standard elements, it is permissible to create your own designations, the main thing is to clearly explain them in the explication to avoid misinterpretations.

What if plans change after the explication is created?

If plans change, the explication must be updated immediately. Any adjustments to the plan must be reflected in the explication to avoid errors and inconsistencies during work. This is critically important for maintaining the relevance of project documentation and controlling the progress of project implementation. An outdated explication can lead to builders working with obsolete data.

Does an explication affect the cost of work?

Directly, an explication is not an expense item, but it significantly impacts the overall cost of work. A clear and complete explication minimizes the risks of errors, reworks, and downtime, which always lead to increased project costs. It allows for accurate calculation of necessary materials and work volumes, which helps obtain more precise estimates and avoid unforeseen expenses. Without an explication, it is difficult to get an accurate estimate and control the budget.

Can one do without an explication when planning?

Theoretically, for a very simple plot with a minimum of elements, one might try to do without a detailed explication, relying on verbal agreements or intuition. However, in practice, this almost always leads to misunderstandings, errors, delays, and additional costs. An explication is insurance against many problems and a guarantee of successful project implementation of any complexity. Without it, you risk getting something other than what you expected.

An explication is not just a formality, but a powerful tool that ensures transparency and accuracy at all stages of a landscape project. It helps translate your ideas into concrete tasks for executors and allows you to control every aspect. By using FormSpace to visualize and detail your plot, you will create a solid foundation for compiling an accurate explication. Also, explore how to choose a landscape design style so that your explication aligns with the overall concept of the plot. Start planning now to make your plot an example of functionality and beauty.