The manuscript entitled SC Shores: A comprehensive shoreline dataset of Spanish sandy beaches from a citizen-science monitoring program.

Main objective of the present manuscript is to introduce SC Shores, a Spain Citizen science Shoreline dataset of geographically corrected shorelines obtained for five stations of the Spanish Coast Snap network. The authors tried to offers a comprehensive description of the process involved in building the SC Shores dataset, along with its limitations and the potential applications for different end-users. SC Shores v.1.0 is designed to be analyzed easily using data science tools and geographic information systems (GIS) software.. The manuscript is well organized and well written but need some modification in order to be suitable for publication. The present manuscript requires corrections.

• Would you clarify the rectification process (transform the image from pixel coordinates u, v to world metric coordinates X,Y,Z) in the data processing section.
  
  
  
  
• The reviewer recommends calibrating your model with high-resolution temporal satellite images for at least two of the studied five coasts (one for the meso-tidal coasts and one for the micro-tidal coasts). It is favorable to do this calibration for the Cadiz site due to shortage of the data during most of the year.
  
  
  
  
• There are several factors affecting the coastal shorelines should be take in consideration within the produced model (especially in the micro-tide shorelines) e.g. waves, winds, thunder rainfalls etc...
  
  
  
  
• With respect to the figures 1, 4 and 7; the reviewer recommends to enlarge the images in order to clarify its content.

Dear authors,

I have read your article and I find it very interesting. I have only a few minor comments.

In the description section of the monitoring stations, can you report if the support for the phone is anti-vibration (in case of wind)? If not, are the images acquired with wind then eliminated from the dataset?

In the section of  the image processing. could you indicate whether these GCPs are located in "fixed" positions/locations(e.g. rocky outcrops, man-made structures, etc.)

Please, could you better describe the procedure for calculating the tidal offsets. In my opinion in not clear how the correction takes place.

In the section of potential application, can the presented tool be also useful for measuring and characterize in morphology the banquette accumulations (Posidonia berms) along Mediterranean beaches? If the authors suppose that the presented tool are suitable for that, a brief description may be provided.